code: public Object getProjectIdOrPath(Object obj) throws GitLabApiException {
  
          if (obj == null) {
              throw (new RuntimeException("Cannot determine ID or path from null object"));
          } else if (obj instanceof Integer) {
              return (obj);
          } else if (obj instanceof String) {
              return (urlEncode(((String) obj).trim()));
          } else if (obj instanceof Project) {
  
              Integer id = ((Project) obj).getId();
              if (id != null && id.intValue() > 0) {
                  return (id);
              }
  
              String path = ((Project) obj).getPathWithNamespace();
              if (path != null && path.trim().length() > 0) {
                  return (urlEncode(path.trim()));
              }
  
              throw (new RuntimeException("Cannot determine ID or path from provided Project instance"));
  
          } else {
  
              throw (new RuntimeException("Cannot determine ID or path from provided " + obj.getClass().getSimpleName() +
                      " instance, must be Integer, String, or a Project instance"));
          }
      }
docs: Returns the project ID or path from the provided Integer, String, or Project instance.
  
  @param obj the object to determine the ID or path from
  @return the project ID or path from the provided Integer, String, or Project instance
  @throws GitLabApiException if any exception occurs during execution