Function transmissible 

pub fn transmissible<V: TowerValue>(v: &V) -> bool

Whether a value of the exact types can travel as data — to a task, through a channel, over the wire: every value but one holding a real built from a function a program defines, in itself, in a germ, in a branch of a residue-dependent value or as a provisional answer. A value model’s own lists are its own to walk.