FileSystemService.checkEntryExistsByName Method
        
 Determines whether a file or folder with the specified name exists in the specified folder.
 
         
        Parameters
        
            - name
            
 
            - 
                
Type: String
The name of the file or folder to check for existence. 
            - parentId
            
 
            - 
                
Type: String
The parent ID of the file or folder to check for existence. 
        
        Return Value
        
Type: jQuery.Promise
        
Value: Boolean
        
A promise object that is resolved when the call is complete.