@Override
    public CoprocessorEnvironment<E> createEnvironment(final E instance, final int priority,
      int sequence, Configuration conf) {
      return new BaseEnvironment<>(instance, priority, 0, cpHostConf);
    }
An {@link Abortable} implementation for tests.
hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestCoprocessorHost.java