@UnstableApi
    public boolean scopeDecoratorAdded() {
        return scopeDecoratorAdded;
    }
Returns whether this {@link RequestContextCurrentTraceContext} is built with {@link ScopeDecorator}s.

@see RequestContextCurrentTraceContextBuilder#addScopeDecorator(ScopeDecorator)
brave/brave6/src/main/java/com/linecorp/armeria/common/brave/RequestContextCurrentTraceContext.java