lv_obj_init_draw_line_dsc() function
Initialize a line draw descriptor from an object's styles in its current state
Arguments
part
part of the object, e.g. `LV_PART_MAIN`, `LV_PART_SCROLLBAR`, `LV_PART_KNOB`, etc
draw_dsc
the descriptor to initialize. Should be initialized with `lv_draw_line_dsc_init(draw_dsc)`.