public MetaPropertiesEnsemble copy() {
            return new MetaPropertiesEnsemble(emptyLogDirs,
                errorLogDirs,
                logDirProps,
                metaLogDir);
        }
Create a new immutable MetaPropertiesEnsemble file.

@return  A new MetaPropertiesEnsemble file containing the changes we made in this Copier.
metadata/src/main/java/org/apache/kafka/metadata/properties/MetaPropertiesEnsemble.java