A retainment assembly that includes a proximal retainer member that is movable between a first retracted position, a second retracted position and a deployed position, a distal retainer member that is movable between a retracted position and a deployed position. When the proximal retainer member moves from the deployed position to the first retracted position the distal retainer member does not move, and when the proximal retainer member moves from the deployed position to the second retracted position the distal retainer member moves from the deployed position to the retracted position.