src/vs/workbench/browser/parts/editor/sideBySideEditor.ts/SideBySideEditor/disposeEditors
class SideBySideEditor:	private disposeEditors(): void {
		if (this.secondaryEditorPane) {
			this.secondaryEditorPane.dispose();
			this.secondaryEditorPane = undefined;
		}

		if (this.primaryEditorPane) {
			this.primaryEditorPane.dispose();
			this.primaryEditorPane = undefined;
		}

		if (this.secondaryEditorContainer) {
			clearNode(this.secondaryEditorContainer);
		}

		if (this.primaryEditorContainer) {
			clearNode(this.primaryEditorContainer);
		}
	}