@Override
    @Nullable
    public String get(@NotNull AbstractPropertyContainer container) {
      if (!container.hasProperty(this)) {
        return null;
      }

      AntConfiguration antConfiguration = INSTANCE.get(container);
      return ProjectRootManager.getInstance(antConfiguration.getProject()).getProjectSdkName();
    }
@Override
    @Nullable
    public String get(@NotNull AbstractPropertyContainer container)