docs: public ClassInfoList getInterfaces(final String className) {
          if (closed.get()) {
              throw new IllegalArgumentException("Cannot use a ScanResult after it has been closed");
          }
          if (!scanSpec.enableClassInfo) {
              throw new IllegalArgumentException("Please call ClassGraph#enableClassInfo() before #scan()");
          }
          final ClassInfo classInfo = classNameToClassInfo.get(className);
          return classInfo == null ? ClassInfoList.EMPTY_LIST : classInfo.getInterfaces();
      }