shell/core/src/main/java/org/apache/karaf/shell/impl/console/RegistryImpl.java [163:183]:
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    public boolean hasService(Class<?> clazz) {
        synchronized (services) {
            for (Object service : services.values()) {
                if (service instanceof Factory) {
                    if (clazz.isAssignableFrom(((Factory<?>) service).clazz)) {
                        if (isVisible(service)) {
                            return true;
                        }
                    }
                } else if (clazz.isInstance(service)) {
                    if (isVisible(service)) {
                        return true;
                    }
                }
            }
        }
        if (parent != null) {
            return parent.hasService(clazz);
        }
        return false;
    }
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shell/core/src/main/java/org/apache/karaf/shell/impl/action/osgi/RegistryImpl.java [170:190]:
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    public boolean hasService(Class<?> clazz) {
        synchronized (services) {
            for (Object service : services.values()) {
                if (service instanceof Factory) {
                    if (clazz.isAssignableFrom(((Factory<?>) service).clazz)) {
                        if (isVisible(service)) {
                            return true;
                        }
                    }
                } else if (clazz.isInstance(service)) {
                    if (isVisible(service)) {
                        return true;
                    }
                }
            }
        }
        if (parent != null) {
            return parent.hasService(clazz);
        }
        return false;
    }
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