export class HandlerAlreadyRegistered extends Error {
  readonly help: string

  constructor(readonly handlerName: string) {
    super(
      `Attempted to register a handler, when a handler with the same name has already been registered.`
    )
    this.help = `Handlers must be registered with a unique $name property`

    Object.setPrototypeOf(this, new.target.prototype)
  }
}