How to use the vscode-css-languageservice.CompletionItemKind function in vscode-css-languageservice

function translateCompletionItemKind(kind: vscode.CompletionItemKind): LitTargetKind {
	switch (kind) {
		case vscode.CompletionItemKind.Method:
			return "memberFunctionElement";
		case vscode.CompletionItemKind.Function:
			return "functionElement";
		case vscode.CompletionItemKind.Constructor:
			return "constructorImplementationElement";
		case vscode.CompletionItemKind.Field:
		case vscode.CompletionItemKind.Variable:
			return "variableElement";
		case vscode.CompletionItemKind.Class:
			return "classElement";
		case vscode.CompletionItemKind.Interface:
			return "interfaceElement";
		case vscode.CompletionItemKind.Module:
			return "moduleElement";
		case vscode.CompletionItemKind.Property:
			return "memberVariableElement";
		case vscode.CompletionItemKind.Unit:
		case vscode.CompletionItemKind.Value:
			return "constElement";
		case vscode.CompletionItemKind.Enum:
			return "enumElement";
		case vscode.CompletionItemKind.Keyword:
			return "keyword";
		case vscode.CompletionItemKind.Color:
			return "constElement";