Constants
-----
<?php

const FOO = true;

#[A]
const BAR = true;
-----
$attrGroup = new Node\AttributeGroup([
    new Node\Attribute(new Node\Name('B'), []),
]);
$stmts[0]->attrGroups[] = $attrGroup;
$stmts[1]->attrGroups[] = $attrGroup;
-----
<?php

#[B]
const FOO = true;

#[A]
#[B]
const BAR = true;
-----
<?php

#[ A,   B]
const FOO = true;

#[
    A,
    B,
]
const BAR = true;
-----
$attr = new Node\Attribute(new Node\Name('C'), []);
$stmts[0]->attrGroups[0]->attrs[] = $attr;
$stmts[1]->attrGroups[0]->attrs[] = $attr;
-----
<?php

#[ A,   B, C]
const FOO = true;

#[
    A,
    B,
    C,
]
const BAR = true;