// if value is non-null: we allow only plugins that have enlisted artifactId only
        // ---
        // end game is: settings enlisted groupIds are obeying order and are "free for all" (artifactId)
        // while POM enlisted plugins coming from non-enlisted settings groupIds (ie conflict of prefixes)
        // will prevail/win.
        LinkedHashMap<String, Set<String>> candidates = Stream.of(build, management)

pkg os/exec, func CommandContext(context.Context, string, ...string) *Cmd
pkg os/user, func LookupGroup(string) (*Group, error)
pkg os/user, func LookupGroupId(string) (*Group, error)
pkg os/user, method (*User) GroupIds() ([]string, error)
pkg os/user, method (UnknownGroupError) Error() string
pkg os/user, method (UnknownGroupIdError) Error() string
pkg os/user, type Group struct
pkg os/user, type Group struct, Gid string

          </association>
        </field>
        <field>
          <name>pluginGroups</name>
          <version>1.0.0+</version>
          <description>
            List of groupIds to search for a plugin when that plugin
            groupId is not explicitly provided.
          </description>
          <association>
            <type>String</type>
            <multiplicity>*</multiplicity>