@Override
          public @NotNull Insets getInsets() {
            return myAction == nextErrorAction ? JBUI.insets(2, 1) :
                   myAction == prevErrorAction ? JBUI.insets(2, 1, 2, 2) :
                   JBUI.insets(2);
          }
@Override
          public @NotNull Insets getInsets()