src/vs/workbench/common/editor/sideBySideEditorInput.ts/SideBySideEditorInput/getTelemetryDescriptor
class SideBySideEditorInput:	override getTelemetryDescriptor(): { [key: string]: unknown } {
		const descriptor = this.primary.getTelemetryDescriptor();

		return { ...descriptor, ...super.getTelemetryDescriptor() };
	}