measure method
Measures the border geometry for the visible sides.
Implementation
BorderMetrics measure([BorderSides sides = BorderSides.all]) {
if (!isVisible) return const BorderMetrics.none();
return BorderMetrics(
leftCells: sides.left ? getLeftSize() : 0,
rightCells: sides.right ? getRightSize() : 0,
topRows: sides.top ? getTopSize() : 0,
bottomRows: sides.bottom ? getBottomSize() : 0,
);
}