No assignment by the contractor of the whole or any part of the money or of such assessment, partial assessment, reassessment and/or bonds due or to become due him under the contract, or for extras in connection therewith, whether made before or after such verified claim is filed, shall be held to take priority over claims filed under Sections 209 and 210, inclusive, of this Article, and all such assignments shall have no effect in so far as claims hereunder are concerned.