Method cannot be called on any member of intersection type intersection - Flow|React|Immutable

Question

Declared props:

type IProps = {
  user: ?Map<string, any> & Record<IUser>,
};

Assigning variables from props using destructuring:

const { user } = this.props;
const { name, surname } = user.toJS();   // <---- flow doesn't like this line

user variable is typeof Map (immutable.js map). Have to use .toJS() to change it into an object. But then the flow error/warning appears:

Flow: Call of method .toJS().
Method cannot be called on any member of intersection type intersection.

Was trying to handle it myself, failed miserably.

Any help highly appreciated!

Answer 1

It was fixed with:

const { name, surname } = user instanceof Map ? user.toJS() : {};