code: def apply_identity(
      op: qml.Identity,
      state,
      is_state_batched: bool = False,
      debugger=None,
  ):
      """Applies a :class:`~.Identity` operation by just returning the input state."""
      return state
  
imports: from functools import singledispatch
  from string import ascii_letters
  import numpy
  import pennylane
  from pennylane import math
label_desc: Use image node_id 6 for calling a global function with example usage: apply_identity(op, state, is_state_batched, debugger) and returns: state