private void setExecFormatAndCompiler(ProgramBuilder builder, String execFormat,
			String compiler) {
		ProgramDB program = builder.getProgram();
		int txID = program.startTransaction("Setting format and compiler.");
		boolean commit = false;
		try {
			if (execFormat != null) {
				program.setExecutableFormat(execFormat);
			}
			if (compiler != null) {
				program.setCompiler(compiler);
			}
			commit = true;
		}
		finally {
			program.endTransaction(txID, commit);
		}
	}
Setup DTM service such that the same instance if used across all test methods.
This assumes that a tool is not used and that the DefaultDataTypeManagerService 
is used.
Ghidra/Features/MicrosoftCodeAnalyzer/src/test/java/ghidra/app/cmd/data/AbstractCreateDataTypeModelTest.java