@NotNull
  @Convert(value = ExtensionNsConverter.class, soft = true)
  @Stubbed
  @ApiStatus.Internal
  GenericAttributeValue<IdeaPlugin> getXmlns();
@NotNull
  @Convert(value = ExtensionNsConverter.class, soft = true)
  @Stubbed
  @ApiStatus.Internal
  GenericAttributeValue<IdeaPlugin> getXmlns()