class_docstr: A wild token that matches conditionally.
  
  arg   - a wild token.
  valid - an additional constraining function on a match.
code: def __eq__(self, other):
      return (
          type(self) is type(other)
          and self.arg == other.arg
          and self.valid == other.valid
      )
  
imports: from sympy.utilities.iterables import kbins
label_desc: Use image node_id 2 for calling the CondVariable obj's underlying member method code with example usage: obj.__eq__(other) and returns: unknown