code: def get_function_ops() -> List[OpSchema]:
      """
      Return operators defined as functions.
      """
  
      schemas = C.get_all_schemas()
      return [
          schema
          for schema in schemas
          if schema.has_function
          or schema.has_context_dependent_function
      ]
  
imports: from typing import List
  from onnx.onnx_cpp2py_export import defs
  from onnx import AttributeProto, FunctionProto
label_desc: Use image node_id 4 for calling a global function with example usage: get_function_ops() and returns: unknown