<FormGroup validationState={this.props.validationState}>
    <FormControl
        type="number"
        inputRef={(ref) => this.editor = ref}
        value={this.props.amount}
        onChange={() => something}
        onBlur={() => something}
    />
    <FormControl.Feedback />
    <HelpBlock>{this.props.helperMessage}</HelpBlock>
</FormGroup>