code: @NotNull
      public Stream<T> equalsOnly(@Nullable final T object) {
          return filter(new Predicate<T>() {
              @Override
              public boolean test(T value) {
                  return Objects.equals(value, object);
              }
          });
      }
docs: Returns {@code Stream} with elements that is equality of {@code object} only.
  
  <p>This is an intermediate operation.
  
  @param object object
  @return the new stream
  @since 1.2.0