src/vs/workbench/common/editor/sideBySideEditorInput.ts/SideBySideEditorInput/getDescription
class SideBySideEditorInput:	override getDescription(verbosity?: Verbosity): string | undefined {
		const preferredDescription = this.getPreferredDescription();
		if (preferredDescription) {
			return preferredDescription;
		}

		if (this.hasIdenticalSides) {
			return this.primary.getDescription(verbosity);
		}

		return super.getDescription(verbosity);
	}