dispatchDecorator.js

const mapDispatchToProps = (dispatch, ownProps) => ({
  getUser(id) {
    dispatch(ownProps.getUser(id))
  }
})

class MyFancyComponent extends React.Component {
  // react things
}

export default connect(() => ({}), mapDispatchToProps)(MyFancyComponent)

/*
  BECOMES
*/

import { mapDispatchToProps } from '../myFancyDecorators'

@mapDispatchToProps((dispatch, ownProps) => ({
    getUser(id) {
      dispatch(ownProps.getUser(id))
    }
}))
export default class MyFancyComponent extends React.Component {
  // react things 
}