Chart NumberAxis missing getDataValueForDisplayPosition API to map pixels to data values

There already is a getDisplayPosition(T value) which maps data values to actual display position ( pixels ). But we need a reverse mapping API as well. Basically mapping pixels on the chart plot - ( mouse pointer x, y etc) to data values.
Justification: We need a way to map data value for a given display position on the axis, so that we ensure API consistency.