Add a mechanism to filter synchronized edges using source and target node

[adaussy]

• I have checked that this feature has not yet been suggested by someone else.

Expected behavior

In some case we want to prevent the creation of a synchronized edge only based on graphical element.

A solution would be to have access to a preconditionExpression called on all source and target pair that would prevent the creation using graphical business rules.

Cuttings backs

Potential side effects

Describe alternatives you've considered

• Using different mapping to differentiate the several cases but it is not possible