Class which represents one node from a metadata tree. Each node contains a key and also an associated value (optional). It also contains a list of nodes which represents its children in the tree. Children can be parsed using '(Const)MetadataNodeIterator' objects provided by '(c)begin' and '(c)end' methods, or directly can be retrieved thanks to 'child' accessor method
Extension used to access view's origins if it exists. Views can be created from scratch, but also from one or many other views. This extension provides methods which allow to build the dependency tree of current view. It also helps to retrieve information to know data origin and to identify a view between others