protonj2-client/src/main/java/org/apache/qpid/protonj2/client/impl/ClientMessage.java [396:421]:
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    @Override
    public boolean hasProperty(String key) {
        if (hasProperties()) {
            return applicationProperties.getValue().containsKey(key);
        } else {
            return false;
        }
    }

    @Override
    public boolean hasProperties() {
        return applicationProperties != null &&
               applicationProperties.getValue() != null &&
               applicationProperties.getValue().size() > 0;
    }

    @Override
    public Object removeProperty(String key) {
        if (hasProperties()) {
            return applicationProperties.getValue().remove(key);
        } else {
            return null;
        }
     }

    @Override
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protonj2-client/src/main/java/org/apache/qpid/protonj2/client/impl/ClientStreamSenderMessage.java [781:806]:
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    @Override
    public boolean hasProperty(String key) {
        if (hasProperties()) {
            return applicationProperties.getValue().containsKey(key);
        } else {
            return false;
        }
    }

    @Override
    public boolean hasProperties() {
        return applicationProperties != null &&
               applicationProperties.getValue() != null &&
               applicationProperties.getValue().size() > 0;
    }

    @Override
    public Object removeProperty(String key) {
        if (hasProperties()) {
            return applicationProperties.getValue().remove(key);
        } else {
            return null;
        }
     }

    @Override
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