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 nm -D /usr/local/lib/x86_64-linux-gnu/libwlroots-0.18.so  | grep backend
                 U gbm_device_get_backend_name
000000000007ae3b T get_rdp_backend_from_backend
0000000000060585 T wlr_backend_autocreate
0000000000060c45 T wlr_backend_commit
000000000005faef T wlr_backend_destroy
000000000005fa8a T wlr_backend_finish
000000000005fcd5 T wlr_backend_get_drm_fd
000000000005fa20 T wlr_backend_init
00000000000642d2 T wlr_backend_is_drm
0000000000086cca T wlr_backend_is_headless
00000000000719d6 T wlr_backend_is_libinput
000000000007b788 T wlr_backend_is_multi
000000000007b094 T wlr_backend_is_rdp
000000000007d918 T wlr_backend_is_wl
0000000000075640 T wlr_backend_is_x11
000000000005fab4 T wlr_backend_start
0000000000060b38 T wlr_backend_test
00000000000645bc T wlr_drm_backend_create
000000000006b72b T wlr_drm_backend_get_non_master_fd
00000000000642f4 T wlr_drm_backend_get_parent
0000000000086beb T wlr_headless_backend_create
0000000000071a92 T wlr_libinput_backend_create
000000000007b8be T wlr_multi_backend_add
000000000007b6bd T wlr_multi_backend_create
000000000007ba86 T wlr_multi_backend_remove
000000000007bb55 T wlr_multi_for_each_backend
000000000007af86 T wlr_rdp_backend_create
000000000007d969 T wlr_wl_backend_create
000000000007e02b T wlr_wl_backend_get_remote_display
0000000000075dc7 T wlr_x11_backend_create