message: diagram proptypes
diff: import React from 'react'
  import classnames from 'classnames'
  +import PropTypes from 'prop-types'
  import plateSingleSrc from '../img/labware/plate_single.png'
  import troughSingleSrc from '../img/labware/trough_single.png'
  @@ -23,3 +24,8 @@ export default function Diagram (props) {
  </div>
  )
  }
  +
  +Diagram.propTypes = {
  + isTiprack: PropTypes.bool.isRequired,
  + type: PropTypes.string.isRequired
  +}
  