public boolean removeAll(Collection<?> collection) {
        return MapCollections.removeAllHelper(this, collection);
    }
Remove all keys in the array map that exist in the given collection.

@param collection The collection whose contents are to be used to remove keys.
@return Returns true if any keys were removed from the array map, else false.
replugin-host-library/replugin-host-lib/src/main/java/com/qihoo360/replugin/utils/basic/ArrayMap.java