Sets the current zoom, clamping it to the allowed range.
setZoom(zoom: number, animate?: boolean): number;
|zoom||number||Zoom value. If this is outside the allowed bounds it will be clamped.|
|animate||boolean||If true, the surface will animate the transition in zoom by stepping through several intermediate levels in succession.|
Current zoom. This may or may not be the value you asked for - it might have been clamped to the current allowed zoom range.