src/vs/editor/common/languageFeatureRegistry.ts/MatchCandidate/equals
class MatchCandidate:	equals(other: MatchCandidate): boolean {
		return this.notebookType === other.notebookType
			&& this.languageId === other.languageId
			&& this.uri.toString() === other.uri.toString()
			&& this.notebookUri?.toString() === other.notebookUri?.toString();
	}