public Object computeContextValueIfAbsent(String key,
			Function<String, Object> mappingFunction) {
		return contextMap.computeIfAbsent(key, mappingFunction);
	}
Get and optionally compute context value for specified key
@param key extension-specific context key
@param mappingFunction function used to compute value if absent
@return context value
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/coff/relocation/CoffRelocationContext.java