docs: Update Vision Product documentation.

[yoshi-automation]

This PR was generated using Autosynth. 🌈

Here's the log from Synthtool:

synthtool > Executing /tmpfs/src/git/autosynth/working_repo/Vision/synth.py.
synthtool > Ensuring dependencies.
synthtool > Pulling artman image.
latest: Pulling from googleapis/artman
Digest: sha256:0e6f3a668cd68afc768ecbe08817cf6e56a0e64fcbdb1c58c3b97492d12418a1
Status: Image is up to date for googleapis/artman:latest
synthtool > Cloning googleapis.
synthtool > Running generator for google/cloud/vision/artman_vision_v1.yaml.
synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/php/google-cloud-vision-v1.
synthtool > Replaced "'serviceAddress' =>" in src/V1/Gapic/ImageAnnotatorGapicClient.php.
synthtool > Replaced "'serviceAddress' =>" in src/V1/Gapic/ProductSearchGapicClient.php.
synthtool > Replaced '@type string \\$serviceAddress\\n\\s+\\*\\s+The address' in src/V1/Gapic/ImageAnnotatorGapicClient.php.
synthtool > Replaced '@type string \\$serviceAddress\\n\\s+\\*\\s+The address' in src/V1/Gapic/ProductSearchGapicClient.php.
synthtool > Replaced '\\$transportConfig, and any \\$serviceAddress' in src/V1/Gapic/ImageAnnotatorGapicClient.php.
synthtool > Replaced '\\$transportConfig, and any \\$serviceAddress' in src/V1/Gapic/ProductSearchGapicClient.php.
synthtool > Replaced 'final class' in src/V1/ListReferenceImagesResponse.php.
synthtool > Replaced 'final class' in src/V1/AsyncBatchAnnotateFilesResponse.php.
synthtool > Replaced 'final class' in src/V1/BatchAnnotateFilesResponse.php.
synthtool > Replaced 'final class' in src/V1/DominantColorsAnnotation.php.
synthtool > Replaced 'final class' in src/V1/ListProductSetsRequest.php.
synthtool > Replaced 'final class' in src/V1/Page.php.
synthtool > Replaced 'final class' in src/V1/AnnotateImageRequest.php.
synthtool > Replaced 'final class' in src/V1/GetReferenceImageRequest.php.
synthtool > Replaced 'final class' in src/V1/CropHint.php.
synthtool > Replaced 'final class' in src/V1/RemoveProductFromProductSetRequest.php.
synthtool > Replaced 'final class' in src/V1/GcsDestination.php.
synthtool > Replaced 'final class' in src/V1/ImageAnnotationContext.php.
synthtool > Replaced 'final class' in src/V1/EntityAnnotation.php.
synthtool > Replaced 'final class' in src/V1/PurgeProductsRequest.php.
synthtool > Replaced 'final class' in src/V1/UpdateProductSetRequest.php.
synthtool > Replaced 'final class' in src/V1/InputConfig.php.
synthtool > Replaced 'final class' in src/V1/AddProductToProductSetRequest.php.
synthtool > Replaced 'final class' in src/V1/TextAnnotation.php.
synthtool > Replaced 'final class' in src/V1/Paragraph.php.
synthtool > Replaced 'final class' in src/V1/ImageContext.php.
synthtool > Replaced 'final class' in src/V1/ImageSource.php.
synthtool > Replaced 'final class' in src/V1/LocalizedObjectAnnotation.php.
synthtool > Replaced 'final class' in src/V1/OutputConfig.php.
synthtool > Replaced 'final class' in src/V1/AnnotateImageResponse.php.
synthtool > Replaced 'final class' in src/V1/DeleteReferenceImageRequest.php.
synthtool > Replaced 'final class' in src/V1/ImageProperties.php.
synthtool > Replaced 'final class' in src/V1/SafeSearchAnnotation.php.
synthtool > Replaced 'final class' in src/V1/ProductSearchResults.php.
synthtool > Replaced 'final class' in src/V1/BoundingPoly.php.
synthtool > Replaced 'final class' in src/V1/AsyncAnnotateFileRequest.php.
synthtool > Replaced 'final class' in src/V1/AnnotateFileResponse.php.
synthtool > Replaced 'final class' in src/V1/CreateProductRequest.php.
synthtool > Replaced 'final class' in src/V1/ImportProductSetsResponse.php.
synthtool > Replaced 'final class' in src/V1/Property.php.
synthtool > Replaced 'final class' in src/V1/Image.php.
synthtool > Replaced 'final class' in src/V1/ListProductsInProductSetResponse.php.
synthtool > Replaced 'final class' in src/V1/ListReferenceImagesRequest.php.
synthtool > Replaced 'final class' in src/V1/CropHintsAnnotation.php.
synthtool > Replaced 'final class' in src/V1/ImportProductSetsGcsSource.php.
synthtool > Replaced 'final class' in src/V1/AsyncBatchAnnotateImagesRequest.php.
synthtool > Replaced 'final class' in src/V1/Feature.php.
synthtool > Replaced 'final class' in src/V1/CreateProductSetRequest.php.
synthtool > Replaced 'final class' in src/V1/ColorInfo.php.
synthtool > Replaced 'final class' in src/V1/Product.php.
synthtool > Replaced 'final class' in src/V1/LocationInfo.php.
synthtool > Replaced 'final class' in src/V1/LatLongRect.php.
synthtool > Replaced 'final class' in src/V1/GetProductRequest.php.
synthtool > Replaced 'final class' in src/V1/CropHintsParams.php.
synthtool > Replaced 'final class' in src/V1/WebDetectionParams.php.
synthtool > Replaced 'final class' in src/V1/Block.php.
synthtool > Replaced 'final class' in src/V1/NormalizedVertex.php.
synthtool > Replaced 'final class' in src/V1/WebDetection.php.
synthtool > Replaced 'final class' in src/V1/ListProductsResponse.php.
synthtool > Replaced 'final class' in src/V1/GcsSource.php.
synthtool > Replaced 'final class' in src/V1/ProductSet.php.
synthtool > Replaced 'final class' in src/V1/DeleteProductSetRequest.php.
synthtool > Replaced 'final class' in src/V1/Word.php.
synthtool > Replaced 'final class' in src/V1/GetProductSetRequest.php.
synthtool > Replaced 'final class' in src/V1/CreateReferenceImageRequest.php.
synthtool > Replaced 'final class' in src/V1/BatchOperationMetadata.php.
synthtool > Replaced 'final class' in src/V1/ImportProductSetsRequest.php.
synthtool > Replaced 'final class' in src/V1/ListProductsRequest.php.
synthtool > Replaced 'final class' in src/V1/BatchAnnotateFilesRequest.php.
synthtool > Replaced 'final class' in src/V1/ProductSearchParams.php.
synthtool > Replaced 'final class' in src/V1/BatchAnnotateImagesRequest.php.
synthtool > Replaced 'final class' in src/V1/Position.php.
synthtool > Replaced 'final class' in src/V1/ProductSetPurgeConfig.php.
synthtool > Replaced 'final class' in src/V1/AsyncAnnotateFileResponse.php.
synthtool > Replaced 'final class' in src/V1/AnnotateFileRequest.php.
synthtool > Replaced 'final class' in src/V1/ReferenceImage.php.
synthtool > Replaced 'final class' in src/V1/BatchAnnotateImagesResponse.php.
synthtool > Replaced 'final class' in src/V1/AsyncBatchAnnotateImagesResponse.php.
synthtool > Replaced 'final class' in src/V1/Vertex.php.
synthtool > Replaced 'final class' in src/V1/ListProductsInProductSetRequest.php.
synthtool > Replaced 'final class' in src/V1/ListProductSetsResponse.php.
synthtool > Replaced 'final class' in src/V1/Symbol.php.
synthtool > Replaced 'final class' in src/V1/DeleteProductRequest.php.
synthtool > Replaced 'final class' in src/V1/UpdateProductRequest.php.
synthtool > Replaced 'final class' in src/V1/ImportProductSetsInputConfig.php.
synthtool > Replaced 'final class' in src/V1/OperationMetadata.php.
synthtool > Replaced 'final class' in src/V1/AsyncBatchAnnotateFilesRequest.php.
synthtool > Replaced 'final class' in src/V1/FaceAnnotation.php.
synthtool > Replaced 'final class' in src/V1/ProductSearchResults/GroupedResult.php.
synthtool > Replaced 'final class' in src/V1/ProductSearchResults/ObjectAnnotation.php.
synthtool > Replaced 'final class' in src/V1/ProductSearchResults/Result.php.
synthtool > Replaced 'final class' in src/V1/TextAnnotation/DetectedBreak.php.
synthtool > Replaced 'final class' in src/V1/TextAnnotation/DetectedLanguage.php.
synthtool > Replaced 'final class' in src/V1/TextAnnotation/TextProperty.php.
synthtool > Replaced 'final class' in src/V1/WebDetection/WebEntity.php.
synthtool > Replaced 'final class' in src/V1/WebDetection/WebImage.php.
synthtool > Replaced 'final class' in src/V1/WebDetection/WebPage.php.
synthtool > Replaced 'final class' in src/V1/WebDetection/WebLabel.php.
synthtool > Replaced 'final class' in src/V1/FaceAnnotation/Landmark.php.
synthtool > Replaced 'final class' in src/V1/Product/KeyValue.php.
synthtool > No replacements made in src/V*/**/*.php for pattern public function ([s|g]\w{3,})Unwrapped, maybe replacement is not longer needed?
synthtool > Replaced 'Copyright \\d{4}' in src/V1/Gapic/ImageAnnotatorGapicClient.php.
synthtool > Replaced 'Copyright \\d{4}' in src/V1/Gapic/ProductSearchGapicClient.php.
synthtool > Replaced 'Copyright \\d{4}' in tests/Unit/V1/ProductSearchClientTest.php.
synthtool > Replaced 'Copyright \\d{4}' in tests/Unit/V1/ImageAnnotatorClientExtensionTest.php.
synthtool > Replaced 'Copyright \\d{4}' in tests/Unit/V1/ImageAnnotatorClientTest.php.
synthtool > Replaced 'Copyright \\d{4}' in tests/Snippet/V1/ImageAnnotatorClientTest.php.
synthtool > Replaced 'Copyright \\d{4}' in tests/System/V1/ImageAnnotatorSmokeTest.php.
synthtool > Replaced 'will be removed in the next major release' in src/V1/BatchOperationMetadata_State.php.
synthtool > Replaced 'will be removed in the next major release' in src/V1/Block_BlockType.php.
synthtool > Replaced 'will be removed in the next major release' in src/V1/Feature_Type.php.
synthtool > Replaced 'will be removed in the next major release' in src/V1/ProductSearchResults_ObjectAnnotation.php.
synthtool > Replaced 'will be removed in the next major release' in src/V1/ProductSearchResults_Result.php.
synthtool > Replaced 'will be removed in the next major release' in src/V1/WebDetection_WebPage.php.
synthtool > Replaced 'will be removed in the next major release' in src/V1/TextAnnotation_DetectedLanguage.php.
synthtool > Replaced 'will be removed in the next major release' in src/V1/WebDetection_WebLabel.php.
synthtool > Replaced 'will be removed in the next major release' in src/V1/TextAnnotation_DetectedBreak_BreakType.php.
synthtool > Replaced 'will be removed in the next major release' in src/V1/WebDetection_WebEntity.php.
synthtool > Replaced 'will be removed in the next major release' in src/V1/OperationMetadata_State.php.
synthtool > Replaced 'will be removed in the next major release' in src/V1/TextAnnotation_DetectedBreak.php.
synthtool > Replaced 'will be removed in the next major release' in src/V1/WebDetection_WebImage.php.
synthtool > Replaced 'will be removed in the next major release' in src/V1/Product_KeyValue.php.
synthtool > Replaced 'will be removed in the next major release' in src/V1/TextAnnotation_TextProperty.php.
synthtool > Replaced 'will be removed in the next major release' in src/V1/FaceAnnotation_Landmark_Type.php.
synthtool > Replaced 'will be removed in the next major release' in src/V1/ProductSearchResults_GroupedResult.php.
synthtool > Replaced 'will be removed in the next major release' in src/V1/FaceAnnotation_Landmark.php.
synthtool > Cleaned up 1 temporary directories.
synthtool > Wrote metadata to synth.metadata.

[codecov]

Codecov Report

Merging #2322 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #2322   +/-   ##
=========================================
  Coverage     92.49%   92.49%           
  Complexity     4479     4479           
=========================================
  Files           311      311           
  Lines         13356    13356           
=========================================
  Hits          12353    12353           
  Misses         1003     1003

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