private void cook() {
			flowsFrom = Collections.unmodifiableMap(flowsFrom);
			flowsTo = Collections.unmodifiableMap(flowsTo);
			branchesFrom = Collections.unmodifiableList(branchesFrom);
			branchesTo = Collections.unmodifiableList(branchesTo);
			branchesOut = Collections.unmodifiableList(branchesOut);
		}
Convert our collections to immutable ones
Ghidra/Framework/Emulation/src/main/java/ghidra/pcode/emu/jit/analysis/JitControlFlowModel.java