withMutation Typing

[pablomaurer]

// store
withMutations((store) => ({
  myMutation: httpMutation((myNum: number) => ({
    url: `/api/register/myMutation/${myNum}`,
    method: 'GET',
    headers: apiHeaders(),
  })),
})),

wrong usage (example 1)

// component
readonly myMutation = this.store.myMutation; // Mutation<number, any>

// html
{{ myMutation.isPending() }}

// runtime error:
ERROR TypeError: ctx.myMutation.isPending is not a function

correct usage (example 2)

// component
readonly myMutationIsPending = this.store.myMutationIsPending;

// html
{{ myMutationIsPending() }}

• I would love that example 1 would work.
• The Typings give you the feeling that example 1 should work, but then you end in a runtime error.