Justify content
Justify content describes how children are aligned along the main axis of their container. Use it to center a child horizontally in a row container, or vertically in a column container.
Flex start (default): Pack children at the start of the container’s main axis.
Flex end: Pack children at the end of the container’s main axis.
Center: Center children along the container’s main axis.
Space between: Space children evenly along the main axis, distributing remaining space between them.
Space around: Space children evenly, distributing remaining space around them, so the first child gets half a gap before it and the last child half a gap after it.
Space evenly: Space children evenly, with the gaps between children and between the children and the container edges all equal.
node.setJustifyContent(Justify.SpaceBetween);