Automated rollback of commit 34d98e8.

*** Reason for rollback ***

New behavior in ERROR-level check needs to be fixed across the depot.

This change, if deployed in a JavaBuilder release, would break many targets ([]

I've confirmed that this rollback fixes at least some of the errors in the
Javabuilder TGP, such as http://sponge2/56c76904-1bce-4ff3-9901-417f257c75ab.

*** Original change description ***

Remove conditional flags now that they are enabled.

#checkreturnvalue

***

PiperOrigin-RevId: 405950518

core/src/main/java/com/google/errorprone/bugpatterns/ReturnValueIgnored.java

@@ -264,11 +264,20 @@ private static boolean functionalMethod(ExpressionTree tree, VisitorState state)
   private static final Matcher<ExpressionTree> PRIMITIVE_METHODS =
       allOf(not(PRIMITIVE_PARSING_METHODS), PRIMITIVE_NON_PARSING_METHODS);
 
+  /**
+   * The return values of {@link java.util.Optional} static methods and some instance methods should
+   * always be checked.
+   */
+  private static final Matcher<ExpressionTree> OPTIONAL_METHODS =
+      anyOf(
+          staticMethod().onClass("java.util.Optional"),
+          instanceMethod().onExactClass("java.util.Optional").namedAnyOf("isEmpty", "isPresent"));
+
   /**
    * The return values of {@link java.util.Optional} methods should always be checked (except for
    * void-returning ones, which won't be checked by AbstractReturnValueIgnored).
    */
-  private static final Matcher<ExpressionTree> OPTIONAL_METHODS =
+  private static final Matcher<ExpressionTree> MORE_OPTIONAL_METHODS =
       anyMethod().onClass("java.util.Optional");
 
   /**
@@ -347,39 +356,37 @@ private static boolean functionalMethod(ExpressionTree tree, VisitorState state)
 
   private static final Matcher<? super ExpressionTree> SPECIALIZED_MATCHER =
       anyOf(
-          // keep-sorted start
-          ARRAYS_METHODS,
-          CHAR_SEQUENCE_METHODS,
-          COLLECTION_METHODS,
-          COLLECTOR_METHODS,
-          ENUM_METHODS,
-          ITERABLE_METHODS,
-          ITERATOR_METHODS,
-          JODA_TIME_METHODS,
-          MAP_ENTRY_METHODS,
-          MAP_METHODS,
-          OBJECTS_METHODS,
-          OPTIONAL_METHODS,
-          PRIMITIVE_METHODS,
-          PROTO_METHODS,
           RETURNS_SAME_TYPE,
           ReturnValueIgnored::functionalMethod,
-          ReturnValueIgnored::javaTimeTypes,
           STREAM_METHODS,
           STRING_METHODS,
-          THROWABLE_METHODS,
-          TIME_UNIT_METHODS
-          // keep-sorted end
-          );
+          PROTO_METHODS,
+          PRIMITIVE_METHODS,
+          ARRAYS_METHODS,
+          OPTIONAL_METHODS,
+          TIME_UNIT_METHODS,
+          ReturnValueIgnored::javaTimeTypes,
+          COLLECTION_METHODS,
+          MAP_METHODS,
+          MAP_ENTRY_METHODS,
+          ITERABLE_METHODS,
+          ITERATOR_METHODS,
+          JODA_TIME_METHODS);
 
   private final Matcher<? super ExpressionTree> matcher;
 
   public ReturnValueIgnored(ErrorProneFlags flags) {
     this.matcher =
         anyOf(
             SPECIALIZED_MATCHER,
+            getMatcher(flags, "ReturnValueIgnored:MoreOptional", MORE_OPTIONAL_METHODS),
             getMatcher(flags, "ReturnValueIgnored:ClassMethods", CLASS_METHODS),
-            getMatcher(flags, "ReturnValueIgnored:ObjectMethods", OBJECT_METHODS));
+            getMatcher(flags, "ReturnValueIgnored:ObjectMethods", OBJECT_METHODS),
+            getMatcher(flags, "ReturnValueIgnored:ObjectsMethods", OBJECTS_METHODS),
+            getMatcher(flags, "ReturnValueIgnored:CharSequenceMethods", CHAR_SEQUENCE_METHODS),
+            getMatcher(flags, "ReturnValueIgnored:EnumMethods", ENUM_METHODS),
+            getMatcher(flags, "ReturnValueIgnored:ThrowableMethods", THROWABLE_METHODS),
+            getMatcher(flags, "ReturnValueIgnored:CollectorMethods", COLLECTOR_METHODS));
   }
 
   private static Matcher<? super ExpressionTree> getMatcher(