Field group 1
Field group 1 description text.
Nested field group 1
Nested field group 1 description text.
  
  
Nested field group 2
Nested field group 3
Field group 3 description text.
  
  
Field group 2
Field group 2 description text.
Field group 3
Field group 3 description text.
  
  
Nested field group 1 (non-expandable)
  
  
Nested field group 2 (non-expandable)
Field group 2 description text.
  
  
Field group 4 (non-expandable)
Field group 4 description text.