text: [brv](../../index.md) / [com.drake.brv.listener](../index.md) / [OnMultiStateListener](index.md) / [onHeaderStartAnimator](./on-header-start-animator.md)
  
  # onHeaderStartAnimator
  
  `open fun onHeaderStartAnimator(header: RefreshHeader?, headerHeight: `[`Int`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`, maxDragHeight: `[`Int`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`): `[`Unit`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html)