getAnnotation() with null namespace should retrieve any annotation(s) with specified name

[amir-zeldes]

There should be an easy way to get an annotation we now exists, even if we don't know its namespace. Perhaps:

SNode someNode;
someNode.getAnnotation(null, "cat"); // get any annotation called 'cat', no matter what namespace

If there is no such annotation this returns null, which can also be used as a convenience function to check whether a node has some annotation. (Or we could alias that as: someNode.hasAnnotation(null, "cat"), which would return boolean).

[FlorianZipser]

I added a fluent way of querying annotations with only names or only namespaces or both:

1. Finding annotations by namespace and name (equal to get(...)):
   node.find(SAnnotation.class).withNamespace("myNamespace").withName("myName").go();
   returns zero or only one annotation
2. Finding annotations by namespace
   node.find(SAnnotation.class).withNamespace("myNamespace").go();
   returns all annotations matching the namespace "myNamespace"
3. Finding annotations by name
   node.find(SAnnotation.class).withName("myNames").go();
   returns all annotations matching the name "myName"

This also works for meta-annotations like:
node.find(SMetaAnnotation.class).withNamespace("myNamespace").withName("myName").go();
...

or for relations, graphs, labels and layers:
relation.find(SMetaAnnotation.class).withNamespace("myNamespace").withName("myName").go();
...

Does this help?

[amir-zeldes]

Excellent, this sounds good! I'll have to give it a try next time I'm working on a module.