public static switch_status_t switch_channel_perform_pre_answer(SWIGTYPE_p_switch_channel channel, string file, string func, int line) { switch_status_t ret = (switch_status_t)freeswitchPINVOKE.switch_channel_perform_pre_answer(SWIGTYPE_p_switch_channel.getCPtr(channel), file, func, line); return ret; }