* Attempts to center the current selection on the screen.

* compute the spherical centroid of a given feature.

* Computes the projected centroid

* Returns a two-element array representing the centroid of this polygon.

* Create a new chord generator

* create a circle generator.

* enable or disable clamping of the output range. * * @param clamp Enable or disable

* Clears the extent, making the brush extent empty.

* Clears all the annotations for this session. This function also triggers the `'changeAnnotation'` event.

* Removes a breakpoint on the row number given by `rows`. This function also emites the `'changeBreakpoint'` event. * @param row A row index

* Removes all breakpoints on the rows. This function also emites the `'changeBreakpoint'` event.

* {:Selection.clearSelection}

* [Empties the selection (by de-selecting it). This function also emits the `'changeSelection'` event.]{: #Selection.clearSelection}

* Clips the subject polygon against this polygon

* Returns the part of the current `Range` that occurs within the boundaries of `firstRow` and `lastRow` as a new `Range` object. * @param fir

* clone():T;

* clone():T;