WINDOW_VALID_P    326 src/window.c     return WINDOW_VALID_P (object) ? Qt : Qnil;
WINDOW_VALID_P    358 src/window.c     else if (WINDOW_VALID_P (frame_or_window))
WINDOW_VALID_P    399 src/window.c     else if (WINDOW_VALID_P (frame_or_window))
WINDOW_VALID_P    426 src/window.c     else if (WINDOW_VALID_P (frame_or_window))
WINDOW_VALID_P   1183 src/window.h     CHECK_TYPE (WINDOW_VALID_P (WINDOW), Qwindow_valid_p, WINDOW)