代码在lambda表达式之外工作,但不是从内部工作

我有以下代码:

override fun onCreate(savedInstanceState: Bundle?) {
    ...
    fab_action.setOnClickListener(actionSetMyLocationEnable) //passing my lambda
}

private val actionSetMyLocationEnable: (View) -> Unit = { it as FloatingActionButton
    it.isSelected = !it.isSelected
    setMyLocationEnable(it.isSelected) //this call work fine
}

private fun setMyLocationEnable(enable: Boolean) {
    if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
                != PackageManager.PERMISSION_GRANTED) {
        ActivityCompat.requestPermissions(
                this,
                arrayOf(Manifest.permission.ACCESS_FINE_LOCATION),
                PERMISSION_REQUEST_ACCESS_FINE_LOCATION)
        return //and this return work nice too
    }
    mMap.isMyLocationEnabled = enable
}

但是,当我按如下方式应用它时:

private val actionSetMyLocationEnable: (View) -> Unit = { it as FloatingActionButton
    it.isSelected = !it.isSelected
    if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
                != PackageManager.PERMISSION_GRANTED) {
        ActivityCompat.requestPermissions(
                this,
                arrayOf(Manifest.permission.ACCESS_FINE_LOCATION),
                PERMISSION_REQUEST_ACCESS_FINE_LOCATION)
        return //error 1
    }
    mMap.isMyLocationEnabled = it.isSelected //error 2
}

我面临两个错误:

错误1。

此处不允许使用“return”

错误2。

调用需要用户可能拒绝的权限:代码应 显式检查权限是否可用(使用 或显式处理潜在的SecurityException

我知道每个错误的含义,但是

我的问题是: 为什么我的代码在lambda表达式之外工作,而在lambda表达式内部不工作?我怎么解决这个问题?

更新

这个 @Rene Ferrari's solution 解决 错误1 . 谢谢 @Rene Ferrari