code: public <T> void generateFromStringTemplate(T model, String outputPath, String content) throws IOException {
          generateFromStringTemplate(model, new String[0], outputPath, content);
      }
docs: Generates a source file from the specified {@link io.sundr.codegen.model.TypeDef}.
  
  @param model         The model of the class to generate.
  @param outputPath    Where to save the generated class.
  @param content       The template to use.
  @throws IOException  If it fails to create the source file.