1 * repo1.content(_) >> { args ->
            args[0].execute(repo1Content)
        }
        1 * repo1Content.excludeGroupAndSubgroups("com.mycompany")
        1 * repo3.content(_) >> { args ->
            args[0].execute(repo3Content)
        }
        1 * repo3Content.excludeGroupAndSubgroups("com.mycompany")
        0 * _
    }

     * is not matched as a subgroup.
     * </p>
     *
     * @param groupPrefix the group prefix to include
     * @since 8.1
     */
    @Incubating
    void excludeGroupAndSubgroups(String groupPrefix);

    /**
     * Declares that an entire group shouldn't be searched for in this repository.
     *
     * @param groupRegex the group name regular expression
     */

                desc.excludeGroup(group);
            }

            @Override
            public void includeGroupAndSubgroups(String groupPrefix) {
                desc.excludeGroupAndSubgroups(groupPrefix);
            }

            @Override
            public void includeGroupByRegex(String groupRegex) {
                desc.excludeGroupByRegex(groupRegex);
            }

        when:
        descriptor.excludeGroup(null)

        then:
        IllegalArgumentException ex = thrown()
        ex.message == "Group cannot be null"

        when:
        descriptor.excludeGroupAndSubgroups(null)

        then:
        ex = thrown()
        ex.message == "Group prefix cannot be null"

        when:
        descriptor.excludeModule("foo", null)

        then:

    public void excludeGroup(String group) {
        checkNotNull(group, "Group cannot be null");
        addExclude(group, null, null, MatcherKind.SIMPLE);
    }

    @Override
    public void excludeGroupAndSubgroups(String groupPrefix) {
        checkNotNull(groupPrefix, "Group prefix cannot be null");
        addExclude(groupPrefix, null, null, MatcherKind.SUB_GROUP);
    }

    @Override