def visit_FloatItem(self, op):
        layout = op.item
        container = self.containers.get(layout.name)
        if container is None:
            return
        if not container.isWindow():
            container.unplug()
            container.float()
        self.init_floating_frame(container, layout)
Handle the FloatItem dock layout op.
dataset/ETHPy150Open ContinuumIO/ashiba/enaml/enaml/qt/docking/layout_builder.py/LayoutBuilder.visit_FloatItem