public static EditingTemplate CreateTemplate( 
   MapMember mapMember,
   CIMEditingTemplate templateDef
)

// Creates new table templates for the specified standalone table.
await QueuedTask.Run(() =>
{
  var table = activeMap.GetStandaloneTablesAsFlattenedList().FirstOrDefault();
  var tableTemplate = table.GetTemplate("Template1");

  var definition = tableTemplate.GetDefinition();
  definition.Description = "New definition";
  definition.Name = "New name";
  //Create new table template using this definition
  table.CreateTemplate(definition);

  //You can also create a new table template using this extension method. You can use this method the same way you use the layer.CreateTemplate method.
  table.CreateTemplate("New template name", "Template description", tags: ["tag 1", "tag 2"]);
});