code: final public ReturnExpressionBuilder<T> returnExp() {
      final int sourceLineNumber = builder.getSourceLineNumber();
      return new ReturnExpressionBuilder<T>(new ExpressionHandler<T>() {
        public T handleExpression(Expression e) {
          return statementHandler().handleStatement(new ReturnStatement(sourceLineNumber, e));
        }
      });
    }
docs: returnExp().{expression}.endReturn()
  @return an expression builder