AOT contribution for @PersistenceContext and @PersistenceUnit

Closes gh-28364

spring-core/src/main/java/org/springframework/javapoet/support/MultiStatement.java

@@ -44,6 +44,16 @@ public final class MultiStatement {
 		return this.statements.isEmpty();
 	}
 
+	/**
+	 * Add the statements defined in the specified multi statement to this instance.
+	 * @param multiStatement the statements to add
+	 * @return {@code this}, to facilitate method chaining
+	 */
+	public MultiStatement add(MultiStatement multiStatement) {
+		this.statements.addAll(multiStatement.statements);
+		return this;
+	}
+
 	/**
 	 * Add the specified {@link CodeBlock codeblock} rendered as-is.
 	 * @param codeBlock the code block to add

spring-core/src/test/java/org/springframework/javapoet/support/MultiStatementTests.java

@@ -150,4 +150,17 @@ class MultiStatementTests {
 				"}");
 	}
 
+	@Test
+	void addWithAnotherMultiStatement() {
+		MultiStatement statements = new MultiStatement();
+		statements.addStatement(CodeBlock.of("test.invoke()"));
+		MultiStatement another = new MultiStatement();
+		another.addStatement(CodeBlock.of("test.another()"));
+		statements.add(another);
+		assertThat(statements.toCodeBlock().toString()).isEqualTo("""
+				test.invoke();
+				test.another();
+				""");
+	}
+
 }