Group use can have trailing comma
-----
<?php
use A\{B,};
use function A\{b,};
-----
array(
    0: Stmt_GroupUse(
        type: TYPE_UNKNOWN (0)
        prefix: Name(
            name: A
        )
        uses: array(
            0: UseItem(
                type: TYPE_NORMAL (1)
                name: Name(
                    name: B
                )
                alias: null
            )
        )
    )
    1: Stmt_GroupUse(
        type: TYPE_FUNCTION (2)
        prefix: Name(
            name: A
        )
        uses: array(
            0: UseItem(
                type: TYPE_UNKNOWN (0)
                name: Name(
                    name: b
                )
                alias: null
            )
        )
    )
)