Called to initialize the extension with its model. 
      Syntax
         
         
            - 
            (
            id< SMPOpenUIDecimalDisplayAdapter >
            ) 
            
               initWithDecimalDisplayModel
            
            : 
            (
            id< SMPOpenUIDecimalDisplayModel >
            ) 
            model
         
      
      Parameters
         
         
            - 
               model – 
               The model for this adapter to use.
            
 
         
       
      Returns
         An initialized object that implements the protocol.