A vertical column of widgets and text with the ability to "float" child
widgets to the left or right, allowing the text to wrap around them —
similar to the functionality of the CSS float and clear properties.
An immutable span of inline content which forms a paragraph. Only useful as
a child of a FloatColumn, which provides the capability of wrapping the
paragraph around child widgets that "float" to the right or left.
Walks the given node and its descendants in pre-order and returns the
value (using getValue) of the first node (including the initial node)
where the where function returns true. If no matching node is found,
null is returned.