def get_node_type(self, node, parent=None):
        """If node is a document, the type is page.
        If node is a binder with no parent, the type is book.
        If node is a translucent binder, the type is either chapters (only
        contain pages) or unit (contains at least one translucent binder).
        """
        if isinstance(node, CompositeDocument):
            return 'composite-page'
        elif isinstance(node, (Document, DocumentPointer)):
            return 'page'
        elif isinstance(node, Binder) and parent is None:
            return 'book'
        for child in node:
            if isinstance(child, TranslucentBinder):
                return 'unit'
        return 'chapter'
def get_node_type ( self , node , parent = None ) : if isinstance ( node , CompositeDocument ) : return 'composite-page' elif isinstance ( node , ( Document , DocumentPointer ) ) : return 'page' elif isinstance ( node , Binder ) and parent is None : return 'book' for child in node : if isinstance ( child , TranslucentBinder ) : return 'unit' return 'chapter'
If node is a document, the type is page.
        If node is a binder with no parent, the type is book.
        If node is a translucent binder, the type is either chapters (only
        contain pages) or unit (contains at least one translucent binder).