diff --git a/sevenbridges/__init__.py b/sevenbridges/__init__.py
index 6e85a60..6dac720 100644
--- a/sevenbridges/__init__.py
+++ b/sevenbridges/__init__.py
@@ -15,9 +15,7 @@
 from sevenbridges.config import Config
 
 from sevenbridges.models.invoice import Invoice
-from sevenbridges.models.billing_group import (
-    BillingGroup, BillingGroupBreakdown
-)
+from sevenbridges.models.billing_group import BillingGroup
 from sevenbridges.models.user import User
 from sevenbridges.models.endpoints import Endpoints
 from sevenbridges.models.project import Project
@@ -59,11 +57,10 @@
 __all__ = [
     # Models
     'Api', 'AsyncJob', 'Automation', 'AutomationRun', 'AutomationMember',
-    'AutomationPackage',  'Config', 'Invoice', 'BillingGroup',
-    'BillingGroupBreakdown', 'User', 'Endpoints', 'Project', 'Task', 'App',
-    'Member', 'Permissions', 'File', 'Export', 'Import', 'Volume',
-    'VolumeObject', 'Marker', 'Division', 'Team', 'TeamMember', 'Dataset',
-    'DRSImportBulk', 'BulkRecord',
+    'AutomationPackage',  'Config', 'Invoice', 'BillingGroup', 'User',
+    'Endpoints', 'Project', 'Task', 'App', 'Member', 'Permissions', 'File',
+    'Export', 'Import', 'Volume', 'VolumeObject', 'Marker', 'Division', 'Team',
+    'TeamMember', 'Dataset', 'DRSImportBulk', 'BulkRecord',
     # Enums
     'AppCopyStrategy', 'AppRawFormat', 'AppCopyStrategy',
     'AsyncFileOperations', 'AsyncJobStates', 'AutomationRunActions',
diff --git a/sevenbridges/models/billing_breakdown.py b/sevenbridges/models/billing_breakdown.py
deleted file mode 100644
index b7f3d2e..0000000
--- a/sevenbridges/models/billing_breakdown.py
+++ /dev/null
@@ -1,24 +0,0 @@
-from sevenbridges.meta.resource import Resource
-from sevenbridges.models.compound.price import Price
-from sevenbridges.models.compound.billing.project_breakdown import (
-    ProjectBreakdown
-)
-from sevenbridges.meta.fields import (
-    HrefField, CompoundListField, CompoundField
-)
-
-
-class BillingGroupBreakdown(Resource):
-    """
-    Central resource for managing billing group breakdowns.
-    """
-    _URL = {
-        'get': '/billing/groups/{id}/breakdown'
-    }
-
-    href = HrefField(read_only=True)
-    project_breakdown = CompoundListField(ProjectBreakdown, read_only=True)
-    total_spending = CompoundField(Price, read_only=True)
-
-    def __str__(self):
-        return '<BillingGroupBreakdown>'
diff --git a/sevenbridges/models/billing_group.py b/sevenbridges/models/billing_group.py
index 5340343..0752976 100644
--- a/sevenbridges/models/billing_group.py
+++ b/sevenbridges/models/billing_group.py
@@ -5,7 +5,6 @@
 from sevenbridges.models.billing_analysis_breakdown import (
     BillingGroupAnalysisBreakdown
 )
-from sevenbridges.models.billing_breakdown import BillingGroupBreakdown
 from sevenbridges.models.billing_storage_breakdown import (
     BillingGroupStorageBreakdown
 )
@@ -55,12 +54,6 @@ def query(cls, offset=None, limit=None, api=None):
             api=api
         )
 
-    def breakdown(self):
-        """
-        Get Billing group breakdown for the current billing group.
-        """
-        return BillingGroupBreakdown.get(self.id, self._api)
-
     def analysis_breakdown(self, date_from=None, date_to=None, invoice_id=None,
                            fields=None, offset=0, limit=50):
         """
diff --git a/sevenbridges/models/volume.py b/sevenbridges/models/volume.py
index f6c429a..d894e57 100644
--- a/sevenbridges/models/volume.py
+++ b/sevenbridges/models/volume.py
@@ -41,7 +41,7 @@ class Volume(Resource):
     service = CompoundField(VolumeService, read_only=False)
     created_on = DateTimeField(read_only=True)
     modified_on = DateTimeField(read_only=True)
-    active = BooleanField(read_only=True)
+    active = BooleanField(read_only=False)
 
     def __eq__(self, other):
         if type(other) is not type(self):
@@ -161,7 +161,7 @@ def create_google_volume(cls, name, bucket, client_email, private_key,
                              properties=None, api=None):
 
         """
-        Create s3 volume.
+        Create google volume.
         :param name: Volume name.
         :param bucket: Referenced bucket.
         :param client_email: Google client email.
@@ -200,6 +200,48 @@ def create_google_volume(cls, name, bucket, client_email, private_key,
         response = api.post(url=cls._URL['query'], data=data).json()
         return Volume(api=api, **response)
 
+    @classmethod
+    def create_google_iam_volume(cls, name, bucket, configuration, access_mode,
+                                 description=None, prefix=None,
+                                 properties=None, api=None):
+
+        """
+        Create google volume.
+        :param name: Volume name.
+        :param bucket: Referenced bucket.
+        :param configuration: Google configuration.
+        :param access_mode: Access Mode.
+        :param description: Volume description.
+        :param prefix: Volume prefix.
+        :param properties: Volume properties.
+        :param api: Api instance.
+        :return: Volume object.
+        """
+        service = {'type': VolumeType.GOOGLE,
+                   'bucket': bucket,
+                   'credentials': {'configuration': configuration}
+                   }
+        if prefix:
+            service['prefix'] = prefix
+        if properties:
+            service['properties'] = properties
+
+        data = {'name': name,
+                'service': service,
+                'access_mode': access_mode
+                }
+        if description:
+            data['description'] = description
+        api = api or cls._API
+
+        extra = {
+            'resource': cls.__name__,
+            'query': data
+        }
+        logger.info('Creating google volume', extra=extra)
+        response = api.post(url=cls._URL['query'], data=data).json()
+        return Volume(api=api, **response)
+
     @classmethod
     def create_oss_volume(cls, name, bucket, endpoint, access_key_id,
                           secret_access_key, access_mode, description=None,