code: public List<GitlabSSHKey> getDeployKeys(Integer targetProjectId) throws IOException {
          String tailUrl = GitlabProject.URL + "/" + targetProjectId + GitlabSSHKey.DEPLOY_KEYS_URL;
          return Arrays.asList(retrieve().to(tailUrl, GitlabSSHKey[].class));
      }
docs: Gets all deploy keys for a project
  
  @param targetProjectId The id of the Gitlab project
  @return The list of project deploy keys
  @throws IOException on gitlab api call error