code: def _setDefaults(configObj={}):
      
  
      paramDict={"build":True,
                "single":True,
                "stepsize":10,
                "in_units":"cps",
                "wt_scl":1.,
                "pixfrac":1.,
                "kernel":"square",
                "fillval":999.,
                "maskval": None,
                "rot":0.,
                "scale":1.,
                "xsh":0.,
                "ysh":0.,
                "blotnx":2048,
                "blotny":2048,
                "outnx":4096,
                "outny":4096,
                "data":None,
                "driz_separate":True,
                "driz_combine":False}
  
      if(len(configObj) !=0):
          for key in configObj.keys():
              paramDict[key]=configObj[key]
  
      return paramDict
docs: set up the default parameters to run drizzle
         build,single,units,wt_scl,pixfrac,kernel,fillval,
         rot,scale,xsh,ysh,blotnx,blotny,outnx,outny,data
  
         Used exclusively for unit-testing, if any are defined.