and DoesNotExist.
                            type: string
                          values:
                            description: values is an array of string values. If the
                              operator is In or NotIn, the values array must be non-empty.
                              If the operator is Exists or DoesNotExist, the values

// relates the key and values.
message LabelSelectorRequirement {
  // key is the label key that the selector applies to.
  // +patchMergeKey=key
  // +patchStrategy=merge
  optional string key = 1;

  // operator represents a key's relationship to a set of values.
  // Valid operators are In, NotIn, Exists and DoesNotExist.
  optional string operator = 2;

   * Returns an iterator over the merged contents of all given {@code iterators}, traversing every
   * element of the input iterators. Equivalent entries will not be de-duplicated.
   *
   * <p>Callers must ensure that the source {@code iterators} are in non-descending order as this
   * method does not sort its input.
   *
   * <p>For any equivalent elements across all {@code iterators}, it is undefined which element is
   * returned first.

   * {@code factory}, and the multimap contents are all serializable.
   *
   * <p>The multimap is not threadsafe when any concurrent operations update the multimap, even if
   * {@code map} and the instances generated by {@code factory} are. Concurrent read operations will
   * work correctly. To allow concurrent update operations, wrap the multimap with a call to {@link
   * #synchronizedMultimap}.
   *

 * entries may be counted in {@link Cache#size}, but will never be visible to read or write
 * operations.
 *
 * <p>Certain cache configurations will result in the accrual of periodic maintenance tasks which
 * will be performed during write operations, or during occasional read operations in the absence of
 * writes. The {@link Cache#cleanUp} method of the returned cache will also perform maintenance, but

 * entries may be counted in {@link Cache#size}, but will never be visible to read or write
 * operations.
 *
 * <p>Certain cache configurations will result in the accrual of periodic maintenance tasks which
 * will be performed during write operations, or during occasional read operations in the absence of
 * writes. The {@link Cache#cleanUp} method of the returned cache will also perform maintenance, but

//              below).
//  opers - Array of operations to become the body of the function or null.
//          - If no array is given (`num_opers` = -1), all the
//          operations in `fn_body` will become part of the function
//          except operations referenced in `inputs`. These operations
//          must have a single output (these operations are typically

import static com.google.common.collect.Iterators.advance;
import static com.google.common.collect.Iterators.all;
import static com.google.common.collect.Iterators.any;
import static com.google.common.collect.Iterators.elementsEqual;
import static com.google.common.collect.Iterators.emptyIterator;
import static com.google.common.collect.Iterators.filter;
import static com.google.common.collect.Iterators.find;

import static com.google.common.collect.Iterators.advance;
import static com.google.common.collect.Iterators.all;
import static com.google.common.collect.Iterators.any;
import static com.google.common.collect.Iterators.elementsEqual;
import static com.google.common.collect.Iterators.emptyIterator;
import static com.google.common.collect.Iterators.filter;
import static com.google.common.collect.Iterators.find;

    }

    @Override
    @CheckForNull
    public E lower(@ParametricNullness E e) {
      return Iterators.find(unfiltered().headSet(e, false).descendingIterator(), predicate, null);
    }

    @Override
    @CheckForNull
    public E floor(@ParametricNullness E e) {
      return Iterators.find(unfiltered().headSet(e, true).descendingIterator(), predicate, null);
    }

    @Override