class_docstr: Registry for symbolic functions.
  
  The registry maintains a mapping from qualified names to symbolic functions.
  It is used to register new symbolic functions and to dispatch calls to
  the appropriate function.
docstr: Returns the function group for the given name.
code: def get_function_group(
      self, name: str
  ) -> Optional[_SymbolicFunctionGroup]:
      """Returns the function group for the given name."""
      return self._registry.get(name)
  
imports: import warnings
  from typing import Callable, Collection, Dict, Generic, Optional, Sequence, Set, TypeVar, Union
  from torch.onnx import _constants, errors
  from torch.onnx._internal import _beartype
label_desc: Use image node_id 4 for calling the SymbolicRegistry obj's underlying member method code with example usage: obj.get_function_group(name) and returns: self