class_docstr: Represents the type of a TensorFlow function.
  
  FunctionType is the canonical way to represent the input/output contract of
  all kinds of functions within the tf.function domain, including:
    - Polymorphic Function
    - Concrete Function
    - Atomic Function
  
  It provides consistent, centralized and layered logic for:
    - Canonicalization of Python input arguments
    - Type-based dispatch to monomorphic functions
    - Packing/unpacking structured python values to Tensors
    - Generation of structured placeholder values for tracing
  
  Additionaly, it also provides:
    - Lossless serialization
    - Native integration with Python function signature representation
    - Seamless migration from older representation formats
code: def __init__(
      self,
      parameters: Sequence[inspect.Parameter],
      captures: Optional[collections.OrderedDict] = None,
      **kwargs,
  ):
      super().__init__(parameters, **kwargs)
      self._captures = (
          captures if captures else collections.OrderedDict()
      )
  
imports: import collections
  import inspect
  from typing import Any, Callable, Dict, List, Mapping, Optional, Sequence, Tuple
  from absl import logging
  from tensorflow.core.function import trace_type
  from tensorflow.core.function.polymorphism import function_type_pb2
  from tensorflow.core.function.trace_type import serialization
  from tensorflow.python.types import core
  from tensorflow.python.types import trace
label_desc: Use image node_id 1 to create a new FunctionType object from inherited base classes: core with example: obj = FunctionType(parameters, captures)