Function ifTransformed

src/store/index.ts:344–354

(
    snapshot: Value,
    getResult: () => Value | undefined,
    then: (result: Value) => Result,
    isEqual: (a: Value, b: Value) => boolean = Object.is,
  )

  };

  const ifTransformed = <Value, Result>(
    snapshot: Value,
    getResult: () => Value | undefined,
    then: (result: Value) => Result,
    isEqual: (a: Value, b: Value) => boolean = Object.is,
  ): Result | undefined =>
    ifNotUndefined(getResult(), (result) =>
      snapshot === result || isEqual(snapshot, result)
        ? then(result)
        : whileMutating(() => then(result)),
    );

  const validateTablesSchema = (
    tableSchema: TablesSchema | undefined,