Flex direction
Flex direction controls the direction in which the children of a node are laid out, also called the main axis. The cross axis is perpendicular to it and is the axis along which wrapped lines stack.
Row (default): Lay children out from left to right. With wrapping, the next line starts under the first item.
Row reverse: Lay children out from right to left. With wrapping, the next line starts under the first item on the right.
Column: Lay children out from top to bottom. With wrapping, the next line starts to the right of the first item.
Column reverse: Lay children out from bottom to top. With wrapping, the next line starts to the right of the first item at the bottom.
Yoga defaults to column; venik follows CSS and defaults to row.
node.setFlexDirection(FlexDirection.Column);