getIndexInEntries method

@override int getIndexInEntries(int xIndex)

###### DATA RELATED METHODS ######

Implementation

@override
int getIndexInEntries(int xIndex) {
  for (int i = 0; i < getEntryCount(); i++) {
    if (xIndex == getEntryForIndex(i)!.x) return i;
  }

  return -1;
}