code: def _as_list(arr):
      """Force being a list, ignore if already is."""
      if isinstance(arr, list):
          return arr
      return [arr]
  
imports: from enum import Enum
  import numpy
  import tvm
  from tvm.ir import IRModule
  from ..None import analysis
  from ..None import expr
  from ..None import function
  from .common import get_relay_op, new_var
label_desc: Use image node_id 21 for calling a global function with example usage: _as_list(arr) and returns: list, arr