protected void checkDataType() throws InvalidDataTypeException {
		// Override this method if the model can't create the data type or doesn't know its size.
	}
Your model must override this method if the model can't always determine the exact
composition of the exception handling data structure and its size.
@throws InvalidDataTypeException if the model can't determine the data type and its size
when placed on memory at the model's address in the program. The exception should contain 
a message that indicates why it can't determine the composition of the data type or its size.
Ghidra/Features/MicrosoftCodeAnalyzer/src/main/java/ghidra/app/cmd/data/AbstractCreateDataTypeModel.java