getLabelMaxX method
Get the maximum (the last, the rightmost) X label value.
If _initialLabelMaxX
is null, which means that labelMaxX value from the constructor
was not supplied, maximum X label value will be retrieved from
ceil(maximum X value in data points).
Implementation
double getLabelMaxX() {
if (_initialLabelMaxX != null) return _initialLabelMaxX!;
return _dataPointMaxX.ceilToDouble();
}