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In file included from
../../libraries/AP_OpticalFlow/AP_OpticalFlow_Pixart.cpp:28:
../../libraries/AP_OpticalFlow/AP_OpticalFlow_Pixart.h:75:13: warning:
private field 'sum_x' is not used [-Wunused-private-field]
int32_t sum_x;
^
../../libraries/AP_OpticalFlow/AP_OpticalFlow_Pixart.h:76:13: warning:
private field 'sum_y' is not used [-Wunused-private-field]
int32_t sum_y;
^
../../libraries/AP_OpticalFlow/AP_OpticalFlow_Pixart.h:77:14: warning:
private field 'last_print_ms' is not used [-Wunused-private-field]
uint32_t last_print_ms;
^
4 warnings generated.