It's impossible to understand that this stands from drawable if you're not familiar with dwm's code.
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RTF6FIROMZBLFDIGA66N3CZXVXKYJWI7TB5RM3B5X4BU5AFIAEMAC
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WH2QXAEHJ3UWIAS5YCRYXCTROAX4SNC3UESM56HUMM3UGUUAAZQAC
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IIWDZCVWWDAJITIXQXCFIAF7Z46DTFV2FYCUYMS4P7JMP34A6BUQC
wlr_renderer_begin(drw, m->wlr_output->width, m->wlr_output->height);
wlr_renderer_clear(drw, rootcolor);
wlr_renderer_begin(renderer, m->wlr_output->width, m->wlr_output->height);
wlr_renderer_clear(renderer, rootcolor);