Datatable search not hide group rows

noomad

I use the jquery.dataTables.js plugin. I have a lot of nested groups.

• Main_group
  
  • Group_level_1
    
    • Group_level_2
      
      • Subgroup_1
      
      
      
      1. Value_1
      2. Value_2
      
      
      • Subgroup_2
      
      
      
      1. Value_1
      2. Value_2
      
      
      • Subgroup_3
      
      
      
      1. Value_1
      2. Value_2

When I search, all hidden except found value.

Find: Value_1 result:

• Value_1
• Value_1
• Value_1

I need to group headers are not hidden. Hiden only the values of subgroup.

• Main_group
  
  • Group_level_1
    
    • Group_level_2
      
      • Subgroup_1
      
      
      
      1. Value_1
    • Subgroup_2
      
      1. Value_1
    • Subgroup_3
      
      1. Value_1

Example code http://jsfiddle.net/j4n87xvy/3/