Add a toLower function

Author: KashifSaadat

main.go

@@ -648,6 +648,11 @@ func constantsOfType(t *types.Type, pkg *apiPackage) []*types.Type {
 	return sortTypes(constants)
 }
 
+// toLower returns the lowercase version of the input string.
+func toLower(s string) string {
+	return strings.ToLower(s)
+}
+
 func render(w io.Writer, pkgs []*apiPackage, config generatorConfig) error {
 	references := findTypeReferences(pkgs)
 	typePkgMap := extractTypeToPackageMap(pkgs)
@@ -690,6 +695,7 @@ func render(w io.Writer, pkgs []*apiPackage, config generatorConfig) error {
 			s = strings.ReplaceAll(s, "}}", "{ '}}' }")
 			return s
 		},
+		"lower": toLower,
 	}).ParseGlob(filepath.Join(*flTemplateDir, "*.tpl"))
 	if err != nil {
 		return errors.Wrap(err, "parse error")