Perhaps I'm not getting something, nothing in this package seems to work at all. ``` this.validate is not a function" in TypeError: this.validate is not a function << at _onSubmit ``` ``` _onSubmit() { this.validate({ emailField: {email: true, required: true}, passwordField: {required: true} }); } ... <TextInput ref="emailField" deviceLocale="fr" style={AppStyles.input} keyboardType="email-address" placeholder="Email Address" onChangeText={(emailField) => this.setState({emailField})} value={this.state.emailField} /> ```