TagLib that overwrite tag and call original

MyExtendedTagLib.groovy

class MyExtendedTagLib {
  
  static namespace = "my"
  
  def grailsApplication

  def input = {attrs, body ->
    //some custom logic that changes attrs here...
    //get the original TagLib, must be the complete path
    def myTagLib = grailsApplication.mainContext.getBean("packages.MyTagLib")
    //and then we can call the original Closure
    myTagLib.input.call(attrs, body)
  }
}