code: def _populate_rtf(run_tag_filter, rtf_proto):
      """Copies `run_tag_filter` into `rtf_proto`."""
      if run_tag_filter is None:
          return
      if run_tag_filter.runs is not None:
          rtf_proto.runs.names[:] = sorted(run_tag_filter.runs)
      if run_tag_filter.tags is not None:
          rtf_proto.tags.names[:] = sorted(run_tag_filter.tags)
  
imports: import collections
  import contextlib
  import grpc
  from tensorboard.util import tensor_util
  from tensorboard.util import timing
  from tensorboard import errors
  from tensorboard.data import provider
  from tensorboard.data.proto import data_provider_pb2
  from tensorboard.data.proto import data_provider_pb2_grpc
label_desc: Use image node_id 3 for calling a global function with example usage: _populate_rtf(run_tag_filter, rtf_proto) without return types