class_docstr: Keeps track of `Function` protos for pprof profile.
docstr: Returns list of `profile_pb2.Function` protos.
docstr_tok: ["Returns","list","of","`","profile_pb2.Function","`","protos","."]
code: def function_protos(self):
      """Returns list of `profile_pb2.Function` protos."""
      return self._function_key_to_function.values()
  
imports: from collections import defaultdict
  from collections import namedtuple
  import gzip
  import os
  import string
  import sys
  import time
  from proto import profile_pb2
label_desc: Use image node_id 3 for calling the Functions obj's underlying member method code with example usage: obj.function_protos() and returns: self