def FromMilliseconds(self, millis):
    """Converts milliseconds since epoch to Timestamp."""
    self.seconds = millis // _MILLIS_PER_SECOND
    self.nanos = (millis % _MILLIS_PER_SECOND) * _NANOS_PER_MILLISECOND
Converts milliseconds since epoch to Timestamp.
deps/protobuf/python/google/protobuf/internal/well_known_types.py