Method remove

guava/src/com/google/common/collect/Maps.java:2881–2892

(@Nullable Object o)

    }

    @Override
    public boolean remove(@Nullable Object o) {
      Iterator<Entry<K, V>> entryItr = unfiltered.entrySet().iterator();
      while (entryItr.hasNext()) {
        Entry<K, V> entry = entryItr.next();
        if (predicate.apply(entry) && Objects.equals(entry.getValue(), o)) {
          entryItr.remove();
          return true;
        }
      }
      return false;
    }

    @Override
    public boolean removeAll(Collection<?> collection) {