[Solved] How to get the last drawn point for a Geometry in OpenLayers

giser Asks: How to get the last drawn point for a Geometry in OpenLayers
I wonder if I can get the position of the last point for a geometry in OpenLayers?

For example, I have an OpenLayers.Geometry.LineString, how to get its last point?

Clarification in the comments:
In fact, what I want is the last drawed point for the polygon. Is it impossible?

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