public static String staticField(final String externalName) {
        requireNonNull(externalName);
        return toUnderscoreSeparated(javaNameFromExternal(externalName)).toUpperCase();
    }
Returns a static field name representation of the specified camel-cased
string.

@param externalName  the string
@return              the static field name representation
common-parent/codegen/src/main/java/com/speedment/common/codegen/util/Formatting.java