private val maskCursor: Buffer.UnsafeCursor? = if (isClient) Buffer.UnsafeCursor() else null

  /** Send a ping with the supplied [payload]. */
  @Throws(IOException::class)
  fun writePing(payload: ByteString) {
    writeControlFrame(OPCODE_CONTROL_PING, payload)
  }

  /** Send a pong with the supplied [payload]. */
  @Throws(IOException::class)
  fun writePong(payload: ByteString) {

  }

  /**
   * Returns the comparator that orders the columns. With natural ordering, {@link
   * Ordering#natural()} is returned.
   *
   * @deprecated Store the {@link Comparator} alongside the {@link Table}. Or, if you know that the
   *     {@link Table} contains at least one value, you can retrieve the {@link Comparator} with:
   *     {@code ((SortedMap<C, V>) table.rowMap().values().iterator().next()).comparator();}.

namespace tensorflow {
class EagerExecutor;
class EagerContext;
class CustomDevice;
class CustomDeviceOpHandler;
class Device;

// LINT.IfChange
// Note: Keep in sync with exported copy of enum in eager/c_api.h.
enum ContextDevicePlacementPolicy {
  // Running operations with input tensors on the wrong device will fail.
  DEVICE_PLACEMENT_EXPLICIT = 0,
  // Copy the tensor to the right device but log a warning.
  DEVICE_PLACEMENT_WARN = 1,

// Package lru provides a thread-safe Least Recently Used (LRU) cache with expirable entries.
package lru

// golang -lru
// https://github.com/hashicorp/golang-lru
import (
	"sync"
	"time"
)

// EvictCallback is used to get a callback when a cache entry is evicted
type EvictCallback[K comparable, V any] func(key K, value V)

// LRU implements a thread-safe LRU with expirable entries.
type LRU[K comparable, V any] struct {
	size      int

 * implement subtleties of the API improperly.
 *
 * <p><b>Custom implementation</b>: Avoid implementing {@code ListenableFuture} from scratch. If you
 * can't get by with the standard implementations, prefer to derive a new {@code Future} instance
 * with the methods in {@link Futures} or, if necessary, to extend {@link AbstractFuture}.
 *
 * <p>Occasionally, an API will return a plain {@code Future} and it will be impossible to change

    @DisplayName("EmptyIterator should support try-with-resources")
    void testTryWithResources() {
        // When & Then
        assertDoesNotThrow(() -> {
            try (EmptyIterator iterator = new EmptyIterator()) {
                assertFalse(iterator.hasNext(), "Iterator should be empty in try-with-resources");
                assertNull(iterator.next(), "Iterator should return null in try-with-resources");

    void testUserFlags() throws Exception {
        PacLogonInfo logonInfo = mock(PacLogonInfo.class);

        // Test with extra SIDs flag
        when(logonInfo.getUserFlags()).thenReturn(PacConstants.LOGON_EXTRA_SIDS);
        assertEquals(PacConstants.LOGON_EXTRA_SIDS, logonInfo.getUserFlags());

        // Test with resource groups flag
        when(logonInfo.getUserFlags()).thenReturn(PacConstants.LOGON_RESOURCE_GROUPS);

        return elements;
    }

    /**
     * Returns a new array with the specified object appended to the end.
     *
     * @param <T>
     *            the type of the array elements
     * @param array
     *            the array. Must not be {@literal null}
     * @param obj
     *            the object to add
     * @return a new array with the object appended
     */

 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *

    }

    /**
     * Returns true if the string ends with the specified substring, ignoring case.
     *
     * @param target1
     *            the text to check
     * @param target2
     *            the substring to compare
     * @return {@literal true} if the string ends with the specified substring, ignoring case
     */