@classmethod
def make_node(cls, node, *params):
    """ This will return a node with a param_list
        (declared in a function declaration)
        Parameters:
            -node: A SymbolPARAMLIST instance or None
            -params: SymbolPARAMDECL insances
        """
    if node is None:
        node = cls()
    if node.token != 'PARAMLIST':
        return cls.make_node(None, node, *params)
    for i in params:
        if i is not None:
            node.appendChild(i)
    return node
