Failed prop type: The prop `children` is marked as required in `MaterialDialog`, but its value is `undefined` in MaterialDialog

[kapilpise]

Hi I am facing problem when using function with return to show Material dialog for loading dynamic values.
This is my code
Please help me I am new in RN

showMaterialDialog(key) {
        this.state.data.filter(obj => {
            return obj.key === key;
        }).map((obj, idx) => {
            return (
                <MaterialDialog
                    title="Use Google's Location Service?"
                    visible={true}
                    onOk={() => this.setState({ visible: false })}
                    onCancel={() => this.setState({ visible: false })}>
                </MaterialDialog>
            )
        })

    }

I am calling this function onPress of Text