modules/implementation-web/src/main/java/org/apache/tuscany/sca/implementation/web/introspect/ReferenceProcessor.java [61:84]:
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    public void visitMethod(Method method, JavaImplementation type) throws IntrospectionException {
        Reference annotation = method.getAnnotation(Reference.class);
        if (annotation == null) {
            return; // Not a reference annotation.
        }
        if (!JavaIntrospectionHelper.isSetter(method)) {
            throw new IllegalReferenceException("Annotated method is not a setter: " + method, method);
        }
        String name = annotation.name();
        if ("".equals(name)) {
            name = JavaIntrospectionHelper.toPropertyName(method.getName());
        }
        JavaElementImpl ref = type.getReferenceMembers().get(name);
        // Setter override field
        if (ref != null && ref.getElementType() != ElementType.FIELD) {
            throw new DuplicateReferenceException(name);
        }
        removeReference(ref, type);

        JavaElementImpl element = new JavaElementImpl(method, 0);
        org.apache.tuscany.sca.assembly.Reference reference = createReference(element, name);
        type.getReferences().add(reference);
        type.getReferenceMembers().put(name, element);
    }
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modules/implementation-java/src/main/java/org/apache/tuscany/sca/implementation/java/introspect/impl/ReferenceProcessor.java [59:82]:
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    public void visitMethod(Method method, JavaImplementation type) throws IntrospectionException {
        Reference annotation = method.getAnnotation(Reference.class);
        if (annotation == null) {
            return; // Not a reference annotation.
        }
        if (!JavaIntrospectionHelper.isSetter(method)) {
            throw new IllegalReferenceException("Annotated method is not a setter: " + method, method);
        }
        String name = annotation.name();
        if ("".equals(name)) {
            name = JavaIntrospectionHelper.toPropertyName(method.getName());
        }
        JavaElementImpl ref = type.getReferenceMembers().get(name);
        // Setter override field
        if (ref != null && ref.getElementType() != ElementType.FIELD) {
            throw new DuplicateReferenceException(name);
        }
        removeReference(ref, type);

        JavaElementImpl element = new JavaElementImpl(method, 0);
        org.apache.tuscany.sca.assembly.Reference reference = createReference(element, name);
        type.getReferences().add(reference);
        type.getReferenceMembers().put(name, element);
    }
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