SMART datagrid v.1 > Classes > TreeOptions
( Deprecated. Use GridStyles.line.)
If it is true, it will specify the style of connection line of tree row.
Defaults to .
tree.setTreeOptions({
linesVisible: true,
// Solid line
line: '#80000000'
// Bold solid line
line: '#80000000, 2'
// Dotted line
line: '#80000000, dotted'
});