static String makeAbsoluteName(String traitName, String defaultNamespace) {
        return traitName.contains("#") ? traitName : defaultNamespace + "#" + traitName;
    }
Makes the given trait name absolute if it is relative.

@param traitName Trait name to make absolute.
@param defaultNamespace Namespace to use if the name is relative.
@return Returns the absolute trait name.
smithy-model/src/main/java/software/amazon/smithy/model/traits/Trait.java