如何从Google选择器按钮更改样式

Question

我正在使用lib react-google-picker

这是我的代码

<GooglePicker clientId={'ClientId'}
                        developerKey={'API'}
                        scope='https://www.googleapis.com/auth/drive'
                        onChange={data => {
                            console.log('on change:', data); 
                            console.log(data.action); 
                            if(data.action == 'picked'){
                                console.log(data.docs[0].id);
                                this.getdoc(data.docs[0].id);
                            }
                        }}
                        onAuthFailed={data => console.log('on auth failed:', data)}
                        multiselect={true}
                        navHidden={true}
                        authImmediate={false}
                        mimeTypes={['image/png', 'image/jpeg', 'image/jpg', 'text/xml']}
                        query={''}
                        viewId={'DOCUMENTS'}>
                    </GooglePicker>

我想知道如何从Google选择器中更改按钮样式/ css，我尝试添加带有'variant = primary'不起作用的react-bootstrap lib