Saving Cobra French Green Bean Seeds.

Hi all,
Due to a close family member becoming gravely ill around July my plot has been left to ruin 
I have had to give this year up as a bad one but I want to salvage all I can, my Cobra French Green Beans have gone past being edible, so can I save the pods for seed next year? As far as I know they are not f1 so will they produce true to their parent plant next year. Before I had to abandon my plot they were producing well & the beans were tasty & I will deffo grow them again.