containerWidths property
Map containing breakpoint labels, and the corresponding container widths, note that "" breakpoint is -1. this is because is must be set to screen width "": screen width sm: 540 md: 720 lg: 960 xl: 1140 xxl: 1320
Implementation
static final Map<String, double> containerWidths = {
breakPointLabels[0]: -1, // set to full width
breakPointLabels[1]: 540,
breakPointLabels[2]: 720,
breakPointLabels[3]: 960,
breakPointLabels[4]: 1140,
breakPointLabels[5]: 1320,
};