To some extent I understand it’s not feasible, because the system doesn’t know if your programmer is keeping hold of some object intentionally or not.
But alternatively, can I see the list of objects and memory that has been allocated? This way I can see the name of those objects which are not intended to hold the memory.
In Flash Builder, you may profile an application to view current and cumulative instances and memory. Large instance counts may be a sign of memory leaks: