Add simple function to know if a key exists in an existed hashmap structure
Add simple function to know if a key exists in an existed hashmap structure

tedsta/redox,nxnfufunezn/redox,achanda/redox,NobbZ/redox,skylerberg/redox,NobbZ/redox,tedsta/redox,stryan/redox,nxnfufunezn/redox,nounoursheureux/redox,vvlevchenko/redox,bheesham/redox,stryan/redox,skylerberg/redox,tedsta/redox,fischmax/redox,skylerberg/redox,fischmax/redox,bheesham/redox,stryan/redox,NobbZ/redox,nounoursheureux/redox,vvlevchenko/redox,imp/redox,imp/redox,imp/redox,NobbZ/redox,bheesham/redox,stryan/redox,tedsta/redox,fischmax/redox,achanda/redox,bheesham/redox,skylerberg/redox,nxnfufunezn/redox,achanda/redox,nounoursheureux/redox,fischmax/redox,vvlevchenko/redox