src/vs/workbench/browser/parts/editor/sideBySideEditor.ts/SideBySideEditor/clearInput
class SideBySideEditor:	override clearInput(): void {
		super.clearInput();

		// Forward to both sides
		this.primaryEditorPane?.clearInput();
		this.secondaryEditorPane?.clearInput();

		// Since we do not keep side editors alive
		// we dispose any editor created for recreation
		this.disposeEditors();
	}