'V.heap() -> idset
Return the set of objects in the visible heap.'

def heap(self):

    global heap_one_time_initialized
    if (not heap_one_time_initialized):
        heap_one_time_initialized = 1
        repr(self.idset(self.hv.heap()))
        x = []
        repr(self.iso(x).shpaths)
        repr(self.iso(x).rp)
    self.gc.collect()
    return self.enter((lambda : self.idset(self.hv.heap())))
