public static void setStaticEncodingMappingValues(Map<Long, List<String>> mappingValues) {
		languageToCharsetIndexMap.clear();
		languageToCharsetIndexMap.putAll(mappingValues);
	}
Sets a static lookup table that maps from old deprecated (language,encoding) index
values to a charset name.
<p>
The old index values were used by old-style MBCS data type.

@param mappingValues map of language_id to list of charset names.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/data/CharsetSettingsDefinition.java