def getBranchMatrixSetElementNode(elementNode):
 branchMatrix = getBranchMatrix(elementNode)
 setElementNodeDictionaryMatrix(elementNode, branchMatrix)
 return branchMatrix

def getBranchMatrixSetElementNode ( elementNode ) : branchMatrix = getBranchMatrix ( elementNode ) setElementNodeDictionaryMatrix ( elementNode , branchMatrix ) return branchMatrix
get matrix starting from the object if it exists .