Method constructor

packages/lit-query/src/useIsMutating.ts:23–36

(
    host: ReactiveControllerHost,
    private readonly filters: Accessor<MutationFilters> = {},
    queryClient?: QueryClient,
  )

  private unsubscribe: (() => void) | undefined

  constructor(
    host: ReactiveControllerHost,
    private readonly filters: Accessor<MutationFilters> = {},
    queryClient?: QueryClient,
  ) {
    super(host, 0, queryClient)

    if (!queryClient) {
      return
    }

    this.queryClient = queryClient
    this.result = this.computeValue()
  }

  protected onConnected(): void {
    if (!this.syncClient()) {