public boolean containsAll(Collection<?> collection) {
        return MapCollections.containsAllHelper(this, collection);
    }
Determine if the array map contains all of the keys in the given collection.

@param collection The collection whose contents are to be checked against.
@return Returns true if this array map contains a key for every entry
in <var>collection</var>, else returns false.
replugin-host-library/replugin-host-lib/src/main/java/com/qihoo360/replugin/utils/basic/ArrayMap.java