code: def def_function(func_name: str, func: BaseFunc) -> None:
      """Define the function which is declared before.
      Parameters
      ----------
      func_name : str
          The function unique name.
      func: BaseFunc
          The given function implementation
      """
      return _ffi_api.DefFunction(func_name, func)
  
file_path: tvm/python/tvm/script/ir_builder/ir/ir.py
imports: from typing import Dict
  from tvm.runtime import Object
  from tvm.ir import BaseFunc, GlobalVar
  from .None import _ffi_api
  from .frame import IRModuleFrame
label_desc: Use image node_id 3 for calling a global function with example usage: def_function(func_name, func) and returns: _ffi_api