Why would the service be null?

gistfile1.groovy

package net.myexample.plugin

class MyExampleService {  
  Map doMunge(Map m) {
    // do stuff to 'm'
    return m
  }
}

/****************************** BREAK: NEXT FILE ******************************/

package net.myexample.plugin

class MyTagLib {
  static namespace = 'p'
  
  def myExampleService
  
  def tag = { attrs, body ->
    def m = doMungeAndFilter(attrs.remove('m'))
    
    out << g.render(template: '/template', plugin: 'my-example-plugin', model: m)
  }
  
  Map doMungeAndFilter(def m) {
    def mm = myExampleService.doMunge(m)
    // do stuff to 'm'
    return mm
  }
}

/****************************** BREAK: NEXT FILE ******************************/

package net.myexample.app

import net.myexample.plugin.MyExampleService

class MyExampleService extends net.myexample.plugin.MyExampleService {
  def doMunge(def m) {
    def mm = super.doMunge(m)
    // do more stuff to 'mm'
    return mm
  }
}

/****************************** BREAK: NEXT FILE ******************************/

package net.myexample.app

import net.myexample.plugin.MyTagLib

class MyTagLib extends net.myexample.plugin.MyTagLib {
  static namespace = 'a'
  
  def myExampleService
  
  def tag = { attrs, body ->
    def m = doMungeAndFilter(attrs.remove('m'))
    
    out << g.render(template: '/template', plugin: 'my-example-plugin', model: m)
  }
  
  Map doMungeAndFilter(def m) {
    def mm = super.doMungeAndFilter(m)
   // do more stuff to 'mm'
    return mm
  } 
}

/**
 * But we get an exception that cites that it cannot call 'doMunge' on a null
 * object -- which could only be 'myExampleService'
 */

• http://notundefined.tumblr.com/post/23704665970/a-grails-question-why-would-this-service-be-null
• http://stackoverflow.com/questions/10747240/grails-why-would-this-service-class-be-null