code: public WikiAttachment uploadAttachment(Object projectIdOrPath, File fileToUpload) throws GitLabApiException {
          return (uploadAttachment(projectIdOrPath, fileToUpload, null));
      }
docs: Uploads a file to the attachment folder inside the wiki’s repository. The attachment folder is the uploads folder.
  
  <pre><code>POST /projects/:id/wikis/attachments</code></pre>
  
  @param projectIdOrPath projectIdOrPath the project in the form of an Integer(ID), String(path), or Project instance, required
  @param fileToUpload the File instance of the file to upload, required
  @return a FileUpload instance with information on the just uploaded file
  @throws GitLabApiException if any exception occurs