-- ftd.color red: red
dark: red

-- foo: First Hello
left: 20

-- foo: Second Hello
right: 10
color: $red


-- ftd.column foo:
optional integer left:
optional integer right:
optional ftd.color color:
caption title: Hello world
anchor: parent
left if $left is not null: $left
right if $right is not null: $right
color if $color is not null: $color
top: 30

--- ftd.text: $title