src/vs/workbench/browser/parts/editor/binaryDiffEditor.ts/BinaryResourceDiffEditor/getMetadata
class BinaryResourceDiffEditor:	getMetadata(): string | undefined {
		const primary = this.primaryEditorPane;
		const secondary = this.secondaryEditorPane;

		if (primary instanceof BaseBinaryResourceEditor && secondary instanceof BaseBinaryResourceEditor) {
			return localize('metadataDiff', "{0} ↔ {1}", secondary.getMetadata(), primary.getMetadata());
		}

		return undefined;
	}