'heap() -> IdentitySet[1]
Traverse the heap from a root to find all reachable and visible
objects. The objects that belong to a heapy instance are normally not
included. Return an IdentitySet with the objects found, which is
presented as a table partitioned according to a default equivalence
relation (Clodo [3]).
See also: setref[2]
References
[0] heapy_Use.html#heapykinds.Use.heap
[1] heapy_UniSet.html#heapykinds.IdentitySet
[2] heapy_Use.html#heapykinds.Use.setref
[3] heapy_Use.html#heapykinds.Use.Clodo'

def heap(self):

    h = self.View.heap()
    h |= self.gcobjs
    h -= self.relheap
    return h
