void createString(boolean isUnicode, Address address, MessageLog log) {
		DataType dataType = isUnicode ? new UnicodeDataType() : new StringDataType();
		createData(address, dataType, log);
	}
Checks if PDB has been loaded in the program

@return whether PDB has been loaded or not
Ghidra/Features/PDB/src/main/java/ghidra/app/util/bin/format/pdb/PdbParser.java