GLX_NV_swap_group
https://www.khronos.org/registry/egl/specs/eglspec.1.5.pdf
GLX_NV_swap_group

	Bool glXBindSwapBarrierNV (Display* dpy, GLuint group, GLuint barrier)
	Bool glXJoinSwapGroupNV (Display* dpy, GLXDrawable drawable, GLuint group)
	Bool glXQueryFrameCountNV (Display* dpy, int screen, GLuint* count)
	Bool glXQueryMaxSwapGroupsNV (Display* dpy, int screen, GLuint* maxGroups, GLuint* maxBarriers)
	Bool glXQuerySwapGroupNV (Display* dpy, GLXDrawable drawable, GLuint* group, GLuint* barrier)
	Bool glXResetFrameCountNV (Display* dpy, int screen)