gistfile1.txt

nine@sphinx:~/test/multiver> tree
.
├── A-1
│   ├── lib
│   │   └── A.pm6
│   └── META.info
├── A-2
│   ├── lib
│   │   └── A.pm6
│   └── META.info
└── lib
    ├── A1User.pm6
    └── A2User.pm6

5 directories, 6 files
nine@sphinx:~/test/multiver> cat A-1/lib/A.pm6 
unit class A;

method a() {
    say "A1!";
}
nine@sphinx:~/test/multiver> cat A-1/META.info 
{
    "name"           : "A",
    "version"       : "0.1",
    "perl"          : "6.c",
    "author"        : "github:niner",
    "authors"       : [ "Stefan Seifert" ],
    "description"   : "Multi version load test",
    "provides"      : {
        "A" : "lib/A.pm6"
    },
    "license"       : "http://www.perlfoundation.org/artistic_license_2_0"
}
nine@sphinx:~/test/multiver> cat A-2/lib/A.pm6 
unit class A;

method a() {
    say "A2!";
}

method b() {
    say "B2!";
}
nine@sphinx:~/test/multiver> cat A-2/META.info 
{
    "name"           : "A",
    "version"       : "0.2",
    "perl"          : "6.c",
    "author"        : "github:niner",
    "authors"       : [ "Stefan Seifert" ],
    "description"   : "Multi version load test",
    "provides"      : {
        "A" : "lib/A.pm6"
    },
    "license"       : "http://www.perlfoundation.org/artistic_license_2_0"
}
nine@sphinx:~/test/multiver> cat lib/A1User.pm6 
unit class A1User;

use A:ver(v0.1);

method a() {
    A.a;
}
nine@sphinx:~/test/multiver> cat lib/A2User.pm6 
unit class A2User;

use A:ver(v0.2);

method a() {
    A.a;
}
nine@sphinx:~/test/multiver> perl6 -Ilib -e 'use A1User; use A2User; A1User.a; A2User.a;'
A1!
A2!