Constant fetches
-----
<?php

A;
A::B;
A::class;
-----
array(
    0: Expr_ConstFetch(
        name: Name(
            parts: array(
                0: A
            )
        )
    )
    1: Expr_ClassConstFetch(
        class: Name(
            parts: array(
                0: A
            )
        )
        name: B
    )
    2: Expr_ClassConstFetch(
        class: Name(
            parts: array(
                0: A
            )
        )
        name: class
    )
)