def __init__(self):
super(DoubleStyle, self).__init__(u'<STR_LIT>',<EOL>u'<STR_LIT>',<EOL>u'<STR_LIT>')<EOL>
u"""
        Double line style, without gaps.

        >>> from anytree import Node, RenderTree
        >>> root = Node("root")
        >>> s0 = Node("sub0", parent=root)
        >>> s0b = Node("sub0B", parent=s0)
        >>> s0a = Node("sub0A", parent=s0)
        >>> s1 = Node("sub1", parent=root)

        >>> print(RenderTree(root, style=DoubleStyle))
        Node('/root')
        ╠══ Node('/root/sub0')
        ║   ╠══ Node('/root/sub0/sub0B')
        ║   ╚══ Node('/root/sub0/sub0A')
        ╚══ Node('/root/sub1')