message: hush console
diff: @@ -19,11 +19,9 @@ class Details extends React.Component {
  render() {
  const {className, children, render = getRenderer(children), ...rest} = this.props
  - // XXX this guards against "double renders" in system-components
  - if (rest.is) {
  - console.warn(`<Details is={${rest.is}}>`)
  + // XXX this guards against "double renders" in system-components,
  + // and prevents prop type warnings for the HTML is attribute
  delete rest.is
  - }
  const {open} = this.state
  return (
  