src/vs/base/browser/ui/grid/gridview.ts/BranchNode/updateSplitviewEdgeSnappingEnablement
class BranchNode:	private updateSplitviewEdgeSnappingEnablement(): void {
		this.splitview.startSnappingEnabled = this._edgeSnapping || this.absoluteOrthogonalOffset > 0;
		this.splitview.endSnappingEnabled = this._edgeSnapping || this.absoluteOrthogonalOffset + this._size < this.absoluteOrthogonalSize;
	}