String getFileCommentContent(File file, Element e) {
   if (file != null) {
     String path = result.config.relativizeFileForSourceComments(file.getAbsolutePath());
     String inCategoryStr = "";
     if (e instanceof Function) {
       Function fc = (Function) e;
       Struct parent;
       if (fc.getType() == Type.ObjCMethod
           && ((parent = as(fc.getParentElement(), Struct.class)) != null)
           && (parent.getCategoryName() != null)) {
         inCategoryStr = "from " + parent.getCategoryName() + " ";
       }
     }
     return "<i>"
         + inCategoryStr
         + "native declaration : "
         + path
         + (e == null || e.getElementLine() < 0 ? "" : ":" + e.getElementLine())
         + "</i>";
   } else if (e != null && e.getElementLine() >= 0) {
     return "<i>native declaration : <input>:" + e.getElementLine() + "</i>";
   }
   return null;
 }
  public void convertFunction(
      Function function,
      Signatures signatures,
      boolean isCallback,
      final DeclarationsHolder out,
      final Identifier libraryClassName,
      int iConstructor) {
    if (result.config.functionsAccepter != null && !result.config.functionsAccepter.adapt(function))
      return;

    // if (function.findParentOfType(Template))
    String library = result.getLibrary(function);
    Identifier functionName = function.getName();
    boolean isMethod = function.getParentElement() instanceof Struct;
    if (functionName == null || isCallback) {
      if (function.getParentElement() instanceof FunctionSignature)
        functionName = ident(result.config.callbackInvokeMethodName);
      else return;
    }
    if (function.getParentElement() instanceof FriendDeclaration) return;

    String n = functionName.toString();
    if (n.contains("<") || n.startsWith("~")) return;

    if (result.config.beautifyNames) functionName = ident(result.typeConverter.beautify(n, false));

    functionName = result.typeConverter.getValidJavaMethodName(functionName);
    if (functionName == null) return;

    // if (functionName.equals("operator"))
    //    functionName

    String sig = function.computeSignature(SignatureType.JavaStyle);

    DeclarationsHolder objOut =
        result.config.reification && !isCallback && !isMethod
            ? new DeclarationsHolder() {

              @Override
              public void addDeclaration(Declaration d) {
                out.addDeclaration(d);
                if (d instanceof Function) {
                  Function f = (Function) d;
                  List<Arg> args = f.getArgs();
                  List<TypeRef> trs = new ArrayList<TypeRef>(2);
                  trs.add(f.getValueType());
                  if (!args.isEmpty()) trs.add(args.get(0).getValueType());

                  for (TypeRef tr : trs) {
                    if (tr instanceof SimpleTypeRef) {
                      Identifier id = ((SimpleTypeRef) tr).getName();
                      if (result.isFakePointer(id)) {
                        result.addFunctionReifiableInFakePointer(id, libraryClassName, f);
                      }
                    }
                  }
                }
              }

              @Override
              public List<Declaration> getDeclarations() {
                return out.getDeclarations();
              }
            }
            : out;

    try {
      convertFunction(
          function,
          signatures,
          isCallback,
          objOut,
          libraryClassName,
          sig,
          functionName,
          library,
          iConstructor);
    } catch (UnsupportedConversionException ex) {
      Declaration d = skipDeclaration(function);
      if (d != null) {
        d.addToCommentBefore(ex.toString());
        out.addDeclaration(d);
      }
    }
  }