src/vs/workbench/common/editor/sideBySideEditorInput.ts/SideBySideEditorInput/getTitle
class SideBySideEditorInput:	override getTitle(verbosity?: Verbosity): string {
		if (this.hasIdenticalSides) {
			return this.primary.getTitle(verbosity) ?? this.getName();
		}

		return super.getTitle(verbosity);
	}