sbool isMarkedAsSrcLib(S snippetID) {
  if (snippetID == null) false;
  
  ifndef NoResourceLoader
  IResourceLoader rl = vm_getResourceLoader();
  if (rl != null)
    ret isJavaxCompilableSnippetType(rl.getSnippetType(snippetID));
  endifndef
  
  ret fileExists(javaxCodeDir("srclibs/" + psI(snippetID));
}