Avoiding Repetition in Error Tag Definitions in Effect TypeScript

import { Effect, Data } from "effect";

interface FetchError { 
  readonly _tag: "FetchError"; 
} 

interface JsonError { 
  readonly _tag: "JsonError"; 
} 

class FetchError extends Data.TaggedError("FetchError")<{}> {} 

class JsonError extends Data.TaggedError("JsonError")<{}> {}