Adds additional reference to Foreign

Author: chalmerlowe

google/cloud/bigquery/enums.py

@@ -267,6 +267,8 @@ def _generate_next_value_(name, start, count, last_values):
     ARRAY = enum.auto()
     STRUCT = enum.auto()
     RANGE = enum.auto()
+    FOREIGN = enum.auto()  # NOTE: FOREIGN acts as a wrapper for data types
+                           # not natively understood by BigQuery unless translated
 
 
 class EntityTypes(str, enum.Enum):
@@ -306,8 +308,8 @@ class SqlTypeNames(str, enum.Enum):
     DATETIME = "DATETIME"
     INTERVAL = "INTERVAL"  # NOTE: not available in legacy types
     RANGE = "RANGE"  # NOTE: not available in legacy types
-    FOREIGN = "FOREIGN"  # NOTE: type acts as a wrapper for data types
-    # not natively understood by BigQuery unless translated
+    FOREIGN = "FOREIGN"  # NOTE: FOREIGN acts as a wrapper for data types
+                         # not natively understood by BigQuery unless translated
 
 
 class WriteDisposition(object):