gtk:stack-vhomogeneous (object)

object -- a gtk:stack widget
homogeneous -- true to make the stack vertically homogeneous

The accessor for the vhomogeneous slot of the gtk:stack class gets or sets whether the stack is vertically homogeneous.

If the stack is homogeneous, the stack will request the same height for all its children. If it is not, the stack may change height when a different child becomes visible.