How to pick a unamed param in a type

[barren lodge]

export type FilterFn<TData extends AnyData> = {
  (
    row: Row<TData>,
    columnId: string,
    filterValue: any,
    addMeta: (meta: any) => void
  ): boolean
  resolveFilterValue?: TransformFilterValueFn<TData>
  autoRemove?: ColumnFilterAutoRemoveTestFn<TData>
  addMeta?: (meta?: any) => void
}

How do I Pick the first param in FilterFn<TData extends AnyData>

(
  row: Row<TData>,
  columnId: string,
  filterValue: any,
  addMeta: (meta: any) => void
): boolean

// use case, this params should sync with `FilterFn`
function MyFn(
  row: Row<TData>,
  columnId: string,
  filterValue: any,
  addMeta: (meta: any) => void
) {
}

[void thicket]

Parameters<FilterFn>

[barren lodge]

Thanks.

export type FilterFn<TData> = {
  (
    row: Row<TData>,
    columnId: string,
    filterValue: any,
    addMeta: (meta: any) => void
  ): boolean
  addMeta?: (meta?: any) => void
};

// targeting `addMeta`
function test1<T>(...[p]: Parameters<FilterFn<T>["addMeta"]>) {..}

// how to target the first group `(row, columnId, filterValue, addMeta)`?
function test2<T>(...[p]: Parameters<FilterFn<T>[0]>) {..}

[void thicket]

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