SingleOrNull<T>  extension 
 
- on
 - 
          
- Iterable<
T>  
 - Iterable<
 
Methods
- 
  singleOrNull(
[bool test(T)?]) → T?  - 
      
Available on Iterable<
Returns the single element of aT> , provided by the SingleOrNull extensionlength = 1list or null otherwise.