qmk_firmware/keyboards/crkbd/keymaps/kidbrazil/layer.h

// [OLED Helpers] ----------------------------------------------------//
// Render empty space on OLED
void render_space(void);
// Render separator characters for rows
void render_separator(void);
// Render layer state
void render_layer_state(void);
// Render USB State
void render_usb_state(void);