code: def FXR_calc(item):
      """
      Calculate False negative rate, False positive rate, False discovery rate (FDR), and False omission rate (FOR).
  
      :param item: item In expression
      :type item:float
      :return: result as float
      """
      try:
          result = 1 - item
          return result
      except TypeError:
          return "None"
  
imports: from __future__ import division
  import math
  from .pycm_util import normal_quantile
  from .pycm_interpret import *
  from .pycm_param import CLASS_PARAMS
label_desc: Use image node_id 11 for calling a global function with example usage: FXR_calc(item) and returns: result, str