↓ 5 callersClass_FieldMaskTreeRepresents a FieldMask in a tree structure. For example, given a FieldMask "foo.bar,foo.baz,bar.baz", the FieldMaskTree will be: [_root] -+
3rdparty/protobuf-3.0.0/python/google/protobuf/internal/well_known_types.py:475