Fix review issues + rebase
@@ -29,7 +29,7 @@ federation_service_type_defs = """
directive @external on FIELD_DEFINITION
directive @requires(fields: String!) on FIELD_DEFINITION
directive @provides(fields: String!) on FIELD_DEFINITION
- directive @key(fields: String!) on OBJECT | INTERFACE
+ directive @key(fields: String!) repeatable on OBJECT | INTERFACE
directive @extends on OBJECT | INTERFACE
"""
