code: final public ThrowExpressionBuilder<T> throwExp() {
      final int sourceLineNumber = builder.getSourceLineNumber();
      return new ThrowExpressionBuilder<T>(new ExpressionHandler<T>() {
        public T handleExpression(Expression e) {
          return statementHandler().handleStatement(new ThrowStatement(sourceLineNumber, e));
        }
      });
    }
docs: throwExp().{expression}.endThrow()
  @return an expression builder