adjustInversion method Null safety

void adjustInversion(
  1. num value
)

Implementation

void adjustInversion(num value) {
  _concat([-1, 0, 0, 0, 0, -1, 0, 0, 0, 0, -1, 0, 0, 0, 0, -1],
      [255, 255, 255, 0]);
}