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  | using System.Collections; 
 |  using System.Collections.Generic; 
 |  using UnityEngine; 
 |  using UnityEngine.UI; 
 |    
 |    
 |  public class GrayGroup : MonoBehaviour 
 |  { 
 |    
 |      Image[] m_Images; 
 |      Image[] images { 
 |          get { 
 |              if (m_Images == null) 
 |              { 
 |                  m_Images = this.GetComponentsInChildren<Image>(); 
 |              } 
 |              return m_Images; 
 |          } 
 |      } 
 |    
 |      bool m_Gray = false; 
 |      public bool gray { 
 |          get { return m_Gray; } 
 |          set { 
 |              m_Gray = value; 
 |    
 |              for (int i = 0; i < images.Length; i++) 
 |              { 
 |                  var image = images[i]; 
 |                  if (this.m_Gray) 
 |                  { 
 |                      image.material = MaterialUtility.GetDefaultSpriteGrayMaterial(); 
 |                  } 
 |                  else 
 |                  { 
 |                      image.material = MaterialUtility.GetUIDefaultGraphicMaterial(); 
 |                  } 
 |    
 |              } 
 |          } 
 |      } 
 |    
 |  } 
 |  
  |