def CreateMesh():
	""" Creates a Multidomain Mesh with predefined priorities between domains
        and specified global and local options                        	"""

	sel=.05  # Suface Edge Length
	mel=.002 # Min Edge Length
	
	#create multi-domain mesh
	global_opt = xcm.GlobalUnstructuredMeshingOptions()
	global_opt.SurfaceEdgeLength = sel
	global_opt.MinEdgeLength = mel

	# Gets all the entities in the folder 'Nerve_Model'	
	entities=s4l.model.AllEntities()['Nerve_Model'].Entities
	
	local_opt_dict={}
	for ent in entities:
		local_opt = xcm.LocalUnstructuredMeshingOptions()
		print((ent, ent.Name))
		if 'Saline' in ent.Name :
			local_opt.Priority=0
		elif 'Silicone' in ent.Name :
			local_opt.Priority=1
		elif 'Electrode' in ent.Name :
			local_opt.Priority=2
		elif 'Nerve' in ent.Name :
			local_opt.Priority=3
		elif 'Interstitial' in ent.Name :
			local_opt.Priority=4
		elif 'Connective' == ent.Name :
			local_opt.Priority=5
		elif 'Connective_' in ent.Name :
			local_opt.Priority=5
		elif 'Blood' in ent.Name :
			local_opt.Priority=6	
		elif 'Fascicle' in ent.Name :
			local_opt.Priority=7
		local_opt_dict[ent]=local_opt	
		print((local_opt.Priority))
		
	# Creates an unstructured mesh on the domains using the defined options
	mesh = xcm.GenerateUnstructuredMesh(entities, global_opt, local_opt_dict)
	
	return

I did have a followup, how do we optimize the surface edge length and minimum edge lengths?