https://github.com/erikras/redux-form-material-ui/issues/162

createComponent.js

import React, { Component } from 'react'

/**
 * Creates a component class that renders the given Material UI component
 *
 * @param MaterialUIComponent The material ui component to render
 * @param mapProps A mapping of props provided by redux-form to the props the Material UI
 * component needs
 */
export default function createComponent(MaterialUIComponent, mapProps) {
  class InputComponent extends Component {
    static displayName = `ReduxFormMaterialUI${MaterialUIComponent.name}`
    getRenderedComponent() {
      return this.component
    }

    render() {
      return (
        <MaterialUIComponent
          {...mapProps(this.props)}
          ref={component => (this.component = component)}
        />
      );
    }
  }
  return InputComponent
}