robolectric/src/main/java/org/robolectric/android/AttributeSetBuilderImpl.java
@Override
  public AttributeSetBuilder addAttribute(int resId, String value) {
    attrToValue.put(resId, value);
    return this;
  }
@Override
  public AttributeSetBuilder addAttribute(int resId, String value) {
    attrToValue.put(resId, value);
    return this;
  }
todo rename to setAttribute(), or just set()?