code: public Pager<PackageFile> getPackageFiles(Object projectIdOrPath,  Integer packageId, int itemsPerPage) throws GitLabApiException {
          return (new Pager<PackageFile>(this, PackageFile.class, itemsPerPage, null,
                  "projects", getProjectIdOrPath(projectIdOrPath), "packages", packageId, "package_files"));
      }
docs: Get a Pager of project package files.
  
  <pre><code>GitLab Endpoint: GET /projects/:id/packages/:package_id/package_files</code></pre>
  
  @param projectIdOrPath the project in the form of an Integer(ID), String(path), or Project instance
  @param packageId the ID of the package to get the package files for
  @param itemsPerPage the number of PackageFile instances per page
  @return a Pager of PackageFile instances for the specified package ID
  @throws GitLabApiException if any exception occurs