fixes formatting

Author: chalmerlowe

google/cloud/bigquery/schema.py

@@ -917,7 +917,7 @@ def from_api_repr(cls, resource: dict) -> SerDeInfo:
         return config
 
 
-class Schema:
+class Schema(collections.UserList):
     # TODO docstrings and type hints
     def __init__(self, fields=None, foreign_type_info=None):
         self._properties = {}
@@ -944,6 +944,15 @@ def _fields(self, value: list) -> None:
         value = _isinstance_or_raise(value, list, none_allowed=True)
         self._properties["_fields"] = value
 
+    @property
+    def data(self):
+        return self._properties.get("_fields")
+
+    @data.setter
+    def data(self, value: list):
+        # for simplicity, no validation in this proof of concept
+        self._properties["_fields"] = value
+
     def __len__(self):
         return len(self._fields)