step
Description:
public async int step (BookCursorStepFlags flags, BookCursorOrigin origin, int count, Cancellable? cancellable, out SList<Contact> out_contacts) throws Error
  
  Steps the cursor through the results by a maximum of count and fetch the results traversed.
See: step_sync.
This asynchronous call is completed with a call to step.end from the specified callback.
Parameters:
| this | |
| flags | 
           The BookCursorStepFlags for this step  | 
      
| origin | 
           The BookCursorOrigin from whence to step  | 
      
| count | 
           a positive or negative amount of contacts to try and fetch  | 
      
| cancellable | 
           a Cancellable to optionally cancel this operation while in progress  | 
      
| callback | 
           callback to call when a result is ready  | 
      
| user_data | 
           user data for the   |