equalTo method
Returns true if this highlight object is equal to the other (compares xIndex and dataSetIndex)
@param h @return
Implementation
bool equalTo(Highlight? h) {
if (h == null) {
return false;
} else {
if (_dataSetIndex == h._dataSetIndex &&
_x == h._x &&
_stackIndex == h._stackIndex &&
_dataIndex == h._dataIndex) {
return true;
} else {
return false;
}
}
}