code: def initial_global_state(self) -> GlobalState:
          
          environment = Environment(
              self.callee_account,
              self.caller,
              self.call_data,
              self.gas_price,
              self.call_value,
              self.origin,
              code=self.code or self.callee_account.code,
          )
          return super().initial_global_state_from_environment(
              environment, active_function="fallback"
          )
docs: Initialize the execution environment.