@Deprecated
  public static String addScreenWidth(String qualifiers, int screenWidth) {
    int qualifiersScreenWidth = Qualifiers.getScreenWidth(qualifiers);
    if (qualifiersScreenWidth == -1) {
      if (qualifiers.length() > 0) {
        qualifiers += "-";
      }
      qualifiers += "w" + screenWidth + "dp";
    }
    return qualifiers;
  }
@Test
  public void addScreenWidth() throws Exception {
    assertThat(Qualifiers.addScreenWidth("", 320)).isEqualTo("w320dp");
    assertThat(Qualifiers.addScreenWidth("w160dp", 320)).isEqualTo("w160dp");
    assertThat(Qualifiers.addScreenWidth("w480dp", 320)).isEqualTo("w480dp");
    assertThat(Qualifiers.addScreenWidth("en-v23", 320))
        .isEqualTo("en-v23-w320dp"); // todo: order is wrong here
    assertThat(Qualifiers.addScreenWidth("en-w160dp-v23", 320)).isEqualTo("en-w160dp-v23");
    assertThat(Qualifiers.addScreenWidth("en-w480dp-v23", 320)).isEqualTo("en-w480dp-v23");
  }