private void clearCustomStorageUse(TaskMonitor monitor) throws CancelledException {

		// Get copy of all function defs to avoid concurrent modification of underlaying table
		ImmutableList<FunctionDefinition> defs = ImmutableList.copyOf(getAllFunctionDefinitions());

		monitor.initialize(defs.size());
		monitor.setMessage("Clear custom storage use...");

//		for (FunctionDefinition def : ImmutableList.copyOf(getAllFunctionDefinitions())) {
		monitor.checkCancelled();
//			monitor.incrementProgress(1);
//
//			// TODO: update function definition
//			if (def.hasCustomStorage()) {
//				
//				
//			}
//		}

	}
Update custom storage for function definitions to be unassigned.
@param monitor task monitor
@throws CancelledException if task cancelled
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/data/StandAloneDataTypeManager.java