whole_func_string: function EqualityConstraint(var1, var2, strength) {
    EqualityConstraint.superConstructor.call(this, var1, var2, strength);
  }
func_code_string: function EqualityConstraint(var1, var2, strength) {
    EqualityConstraint.superConstructor.call(this, var1, var2, strength);
  }
func_documentation_string: /* --- *
  E q u a l i t  y   C o n s t r a i n t
  --- 
  Constrains two variables to have the same value.