throw new UnsupportedOperationException();
    }

    @Override
    public void shutdown() {
      throw new UnsupportedOperationException();
    }

    @Override
    public List<Runnable> shutdownNow() {
      throw new UnsupportedOperationException();
    }

    @Override
    public boolean isShutdown() {
      throw new UnsupportedOperationException();
    }

    // Test initializeProbes method
    @Test
    public void test_initializeProbes() {
        // Simply test that the method doesn't throw exceptions
        try {
            Crawler.initializeProbes();
        } catch (Exception e) {
            fail("initializeProbes should not throw exception: " + e.getMessage());
        }
    }

    // Test main method with invalid arguments
    @Test

                // Try to remove idle connections
                removeIdleConnections();

                // If still at limit, throw exception
                if (this.connections.size() >= maxPoolSize) {
                    throw new IllegalStateException("Connection pool has reached maximum size of " + maxPoolSize
                            + ". Consider increasing pool size or closing idle connections.");

      throw new UnsupportedOperationException();
    }

    @Override
    public void shutdown() {
      throw new UnsupportedOperationException();
    }

    @Override
    public List<Runnable> shutdownNow() {
      throw new UnsupportedOperationException();
    }

    @Override
    public boolean isShutdown() {
      throw new UnsupportedOperationException();
    }

        assertArgumentNotNull("ps", ps);

        try {
            return ps.executeQuery();
        } catch (final SQLException ex) {
            throw new SQLRuntimeException(ex);
        }
    }

    /**
     * Executes the update.
     *
     * @param ps
     *            {@link PreparedStatement}. Must not be {@literal null}.

      } else {
        throw ProtocolException("Unexpected status line: $statusLine")
      }

      // Parse response code like "200". Always 3 digits.
      if (statusLine.length < codeStart + 3) {
        throw ProtocolException("Unexpected status line: $statusLine")
      }
      val code =
        statusLine.substring(codeStart, codeStart + 3).toIntOrNull()
          ?: throw ProtocolException(

   *     write {@code throw sneakyThrow(t);} to convince the compiler that the statement will always
   *     throw.
   */
  @CanIgnoreReturnValue
  static Error sneakyThrow(Throwable t) {
    throw new SneakyThrows<Error>().throwIt(t);
  }

  @SuppressWarnings("unchecked") // not really safe, but that's the point
  private Error throwIt(Throwable t) throws T {
    throw (T) t;
  }

  private SneakyThrows() {}

   *     write {@code throw sneakyThrow(t);} to convince the compiler that the statement will always
   *     throw.
   */
  @CanIgnoreReturnValue
  static Error sneakyThrow(Throwable t) {
    throw new SneakyThrows<Error>().throwIt(t);
  }

  @SuppressWarnings("unchecked") // not really safe, but that's the point
  private Error throwIt(Throwable t) throws T {
    throw (T) t;
  }

  private SneakyThrows() {}

            return container.lookup(type);
        } catch (ComponentLookupException e) {
            throw new LookupException(e);
        }
    }

    @Override
    public <T> T lookup(Class<T> type, String name) {
        try {
            return container.lookup(type, name);
        } catch (ComponentLookupException e) {
            throw new LookupException(e);
        }
    }

    @Override

        if (from == null) {
            throw new InvalidUserDataException("Missing \"from\" setting for license name mapping");
        }
        String to = props.get("to");
        if (to == null) {
            throw new InvalidUserDataException("Missing \"to\" setting for license name mapping");
        }
        if (props.size() > 2) {