code: def __add__(self, increment):
      return Debug(self.verbose, self.indent + 1, self.lines)
  
imports: from nltk.inference.api import BaseProverCommand, Prover
  from nltk.internals import Counter
  from nltk.sem.logic import AbstractVariableExpression, AllExpression, AndExpression, ApplicationExpression, EqualityExpression, ExistsExpression, Expression, FunctionVariableExpression, IffExpression, ImpExpression, LambdaExpression, NegatedExpression, OrExpression, Variable, VariableExpression, unique_variable
label_desc: Use image node_id 2 for calling the Debug obj's underlying member method code with example usage: obj.__add__(increment) and returns: Debug