src/vs/base/browser/ui/sash/sash.ts/Sash/onPointerDoublePress
class Sash:	private onPointerDoublePress(e: MouseEvent): void {
		const orthogonalSash = this.getOrthogonalSash(e);

		if (orthogonalSash) {
			orthogonalSash._onDidReset.fire();
		}

		if (this.linkedSash) {
			this.linkedSash._onDidReset.fire();
		}

		this._onDidReset.fire();
	}