如何在Camera X支持库中设置曝光补偿？

dependencies {
    def camerax_version = "1.1.0-alpha07"
    implementation "androidx.camera:camera-camera2:$camerax_version"
    implementation "androidx.camera:camera-lifecycle:$camerax_version"
    implementation "androidx.camera:camera-view:1.0.0-alpha24"
}

<androidx.camera.view.PreviewView
    android:id="@+id/previewView"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

val previewConfig = PreviewConfig.Builder().build()
val preview = Preview(previewConfig)

val cameraSelector = CameraSelector.Builder()
    .requireLensFacing(CameraSelector.LENS_FACING_BACK)
    .build()

CameraX.bindToLifecycle(this, cameraSelector, preview)

preview.setSurfaceProvider(previewView.createSurfaceProvider())

val cameraControl = CameraX.getCameraControl(cameraSelector)
cameraControl.setLinearZoom(exposureCompensationValue)