private const val EXTRA_QUERY = "extraQuery"
class DataSourceFactory(
    val myAdvancedSearch: myAdvancedSearch,
    var query:String
): DataSource.Factory<Int, Model>() {

    val mutableLiveData = MutableLiveData<DataSource>()
    var dataSource: DataSource? = null


    override fun create(): DataSource<Int, Model> {
        query = MyFragment.queryVendor
        dataSource = DataSource(myAdvancedSearch,query)
        mutableLiveData.postValue(dataSource)
        return dataSource as DataSource
    }

    companion object{
        fun newInstance(query:String): MyFragment {
            return MyFragment().apply {
                arguments = Bundle().apply {
                    putString(EXTRA_QUERY, query)
                }
            }
        }
    }
}