Man pages matching name xcb_selinux_get_client_context in section 3:

xcb_selinux_get_client_context.3.en	debian 10 / libxcb-doc
xcb_selinux_get_client_context.3.en	debian 11 / libxcb-doc
xcb_selinux_get_client_context.3.en	debian 12 / libxcb-doc