'Remove a single node.
Arguments:
nodeId  -- Node ID of the item to remove.'

def del_node(self, nodeId):

    if (nodeId in self._nodes):
        nodes = [i for i in self.iterables if isinstance(i, RequestNode)]
        for node in nodes:
            if (node['nodeId'] == nodeId):
                self.xml.remove(node.xml)
                self.iterables.remove(node)
                return True
    return False
