public static StroomZipFileType fromCanonicalExtension(final String canonicalExtension) {
        return NullSafe.isNonEmptyString(canonicalExtension)
                ? CANONICAL_EXTENSION_MAP.get(canonicalExtension)
                : null;
    }
Map strictly from the canonical extension to the StroomZipFileType, but NOT from an extensionAlias.
Case-sensitive.
If no match is found will return null.
stroom-data/stroom-data-zip/src/main/java/stroom/data/zip/StroomZipFileType.java