static ConcurrentAttributes fromParent(AttributesGetters parent) {
        requireNonNull(parent, "parent");
        return new DefaultConcurrentAttributes(parent);
    }
Returns a new {@link ConcurrentAttributes} with the specified parent {@link AttributesGetters}.
The parent {@link AttributesGetters} can be accessed via {@link #attr(AttributeKey)} or {@link #attrs()}.

<p>Note that any mutations in {@link ConcurrentAttributes} won't modify the attributes in the parent.
core/src/main/java/com/linecorp/armeria/common/ConcurrentAttributes.java