@Override
	public boolean equals(Object obj) {
		if (this == obj) {
			return true;
		}
		if (obj == null) {
			return false;
		}
		if (getClass() != obj.getClass()) {
			return false;
		}
		FunctionNode other = (FunctionNode) obj;
		if (addr == null) {
			if (other.addr != null) {
				return false;
			}
		}
		else if (!addr.equals(other.addr)) {
			return false;
		}
		return true;
	}
Allocate a container for FunctionNodes as needed by the NeighborGenerators.  These are generally small sets
where we need to check containment constantly.
@return the container
Ghidra/Features/VersionTrackingBSim/src/main/java/ghidra/feature/vt/api/FunctionNode.java