jodd-jtx/src/main/java/jodd/jtx/JtxTransactionManager.java
protected JtxTransaction propRequired(JtxTransaction currentTx, final JtxTransactionMode mode, final Object scope) {
		if ((currentTx == null) || (currentTx.isNoTransaction())) {
			currentTx = createNewTransaction(mode, scope, true);
		} else {
			continueTx(currentTx, mode);
		}
		return currentTx;
	}
protected JtxTransaction propRequired(JtxTransaction currentTx, final JtxTransactionMode mode, final Object scope) {
		if ((currentTx == null) || (currentTx.isNoTransaction())) {
			currentTx = createNewTransaction(mode, scope, true);
		} else {
			continueTx(currentTx, mode);
		}
		return currentTx;
	}
Propagation: REQUIRED
<pre>{@code
None -> T2
T1   -> T1 (cont.)
}</pre>