Dialog component onClose called twice

[gutenye]

Example from https://react-mdc.github.io/#/dialog

<Dialog open={this.state.open} onClose={onClose}>
  ...
</Dialog>

onClose = () => {
  console.log('close')
   this.setState({open: false})
}

When close a dialog, console outputs two close string. Due to the way it implemented, when user close the dialog, it invoke onClose callback. (first time). The onClose function do setState({open: false} which invoke onClose callback again. (second time)