public final void start() {
		if (currentProgram == null) {
			return;
		}
		if (transactionID == -1) {
			transactionID = currentProgram.startTransaction(getClass().getName());
		}
	}
Starts a transaction on the current program.
Ghidra/Features/Base/src/main/java/ghidra/program/flatapi/FlatProgramAPI.java