Pick up enum fixes in the GAPIC generator. (#6607)

Author: yoshi-automation

asset/google/cloud/asset_v1beta1/gapic/enums.py

@@ -18,6 +18,19 @@
 import enum
 
 
+class NullValue(enum.IntEnum):
+    """
+    ``NullValue`` is a singleton enumeration to represent the null value for
+    the ``Value`` type union.
+
+    The JSON representation for ``NullValue`` is JSON ``null``.
+
+    Attributes:
+      NULL_VALUE (int): Null value.
+    """
+    NULL_VALUE = 0
+
+
 class ContentType(enum.IntEnum):
     """
     Asset content type.
@@ -30,16 +43,3 @@ class ContentType(enum.IntEnum):
     CONTENT_TYPE_UNSPECIFIED = 0
     RESOURCE = 1
     IAM_POLICY = 2
-
-
-class NullValue(enum.IntEnum):
-    """
-    ``NullValue`` is a singleton enumeration to represent the null value for
-    the ``Value`` type union.
-
-    The JSON representation for ``NullValue`` is JSON ``null``.
-
-    Attributes:
-      NULL_VALUE (int): Null value.
-    """
-    NULL_VALUE = 0