@Nonnull
	public ExtensionMapping getExtensionsToLangKeys() {
		return extensionsToLangKeys;
	}
@return Map of file extensions to {@link RegexLanguages} name keys.

@see RegexLanguages#getLanguage(String)
recaf-ui/src/main/java/software/coley/recaf/services/info/association/FileTypeSyntaxAssociationServiceConfig.java