code: def _get_param_var(params, prefix, item):
      name = _get_params_name(prefix, item)
      if name not in params:
          raise AttributeError(f"{name} not found in params dict.")
      return new_var(
          name, shape=params[name].shape, dtype=params[name].dtype
      )
  
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 4 for calling a global function with example usage: _get_param_var(params, prefix, item) and returns: new_var