Customize an InstantSearch Android widget

  val searchBoxView = SearchBoxViewImpl(SearchView(context))
  searchBoxView.searchView.inputType = InputType.TYPE_TEXT_FLAG_CAP_CHARACTERS

public class SearchBoxViewEditText(
  public val editText: EditText
) : SearchBoxView {

  override var onQueryChanged: ((String?) -> Unit)? = null
  override var onQuerySubmitted: ((String?) -> Unit)? = null

  init {
      editText.addTextChangedListener(object : TextWatcher {

          override fun afterTextChanged(s: Editable?) = Unit

          override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) = Unit

          override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
              onQueryChanged?.invoke(s?.toString())
          }
      })
  }

  override fun setItem(item: String?) {
      editText.setText(item)
  }
}