How do I hide the public API methods of my extending class?

How do I hide the public API methods of my extending class?

I have written an DataAdapter library that has dependency(tightly coupled)
with a core-data library (coredata library helps to store,manage data in
the DB) and hence I create API's in DataAdapter class extending the core
data class to have quick access to all the API's of core data class.
However, as I have extended the core data class in my DataAdapter class,
all the API's in core data class is visible to the developer through
DataAdapter class(which I don't want to happen, basically wanting him to
use adapter API methods only.)
Eg: Core data has an API as
(CoreDataResponse *) getAllManagedObjectsOfEntity:(CoreDataRequest *)request;
DataAdapter has an API as `
-(DBResponse *)getAllStoredRecordsFromDB;
The exact issue is, Xcode autosuggestion for adapter methods shows up core
data API'S as well as below - But I want my developer using the data
adapter to access only the API methods of DataAdapter, How can I achieve
it?
Update -1: This is my Adapter header class extended with coredata
#import "CoreDataManager.h"
@interface DataAdapter : CoreDataManager
-(DBResponse *)getAllStoredRecordsFromDB;
@end