code: function defaultMapThemrProps(ownProps, theme) {
    const {
      composeTheme,   //eslint-disable-line no-unused-vars
      innerRef,
      themeNamespace, //eslint-disable-line no-unused-vars
      mapThemrProps,  //eslint-disable-line no-unused-vars
      ...rest
    } = ownProps
  
    return {
      ...rest,
      ref: innerRef,
      theme
    }
  }
docs: Maps props and theme to an object that will be used to pass down props to the
  decorated component.
  
  @param {Object} ownProps - All props given to the decorated component
  @param {Object} theme - Calculated then that should be passed down
  @returns {Object} - Props that will be passed down to the decorated component