code: /*
   * Copyright (c) 2016-present, RxJava Contributors.
   *
   * Licensed 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
   *
   * Unless required by applicable law or agreed to in writing, software distributed under the License is
   * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
   * the License for the specific language governing permissions and limitations under the License.
   */
  
  package io.reactivex.rxjava3.annotations;
  
  /**
   * Enumeration for various kinds of backpressure support.
   * @since 2.0
   */
  public enum BackpressureKind {
      /**
       * The backpressure-related requests pass through this operator without change.
       */
      PASS_THROUGH,
      /**
       * The operator fully supports backpressure and may coordinate downstream requests
       * with upstream requests through batching, arbitration or by other means.
       */
      FULL,
      /**
       * The operator performs special backpressure management; see the associated javadoc.
       */
      SPECIAL,
      /**
       * The operator requests {@link Long#MAX_VALUE} from upstream but respects the backpressure
       * of the downstream.
       */
      UNBOUNDED_IN,
      /**
       * The operator will emit a {@link io.reactivex.rxjava3.exceptions.MissingBackpressureException MissingBackpressureException}
       * if the downstream didn't request enough or in time.
       */
      ERROR,
      /**
       * The operator ignores all kinds of backpressure and may overflow the downstream.
       */
      NONE
  }
  