set default option values for graphability
set default values, both hooks
node id of corresponding node
add an empty object as placeholder for relationships, use is optional
Extend middleware for graph use
skip remove node if no node id is set
Remove also all relationships
Attach/Save corresponding node
if we have fields to store in node and they have to be inde
console.log dataForNode, node.id
delete a key/value if it has an undefined value
TODO: implement exception handler
skip if is set explizit to false