code: def identity_partition_function(ref_call, new_args, ctx):
      cond, expr = partition_expr_check(new_args[0])
      if cond:
          return QPartitionExpr(_forward_op(ref_call, [expr]))
      return None
  
file_path: tvm/python/tvm/relay/quantize/_partition.py
imports: import tvm
  from ..None import expr
  from ..None import analysis
  from .None import _quantize
  from .quantize import _forward_op
label_desc: Use image node_id 4 for calling a global function with example usage: identity_partition_function(ref_call, new_args, ctx) and returns: None, QPartitionExpr