code: def solve_one(self, expr, constrain=False):
          
          expr = self.migrate_expression(expr)
          value = self._solver.get_value(self._constraints, expr)
          if constrain:
              self.constrain(expr == value)
          #Include forgiveness here
          if isinstance(value, bytearray):
              value = bytes(value)
          return value
docs: Concretize a symbolic :class:`~manticore.core.smtlib.expression.Expression` into
          one solution.
  
          :param manticore.core.smtlib.Expression expr: Symbolic value to concretize
          :param bool constrain: If True, constrain expr to concretized value
          :return: Concrete value
          :rtype: int