public int getItemCount() {
return mItems.size();
}
public abstract PVH onCreateParentViewHolder(ViewGroup parent, int parentType);
public abstract CVH onCreateChildViewHolder(ViewGroup child, int childType);
<BUG>public abstract void onBindParentViewHolder(PVH parentViewHolder, int parentPosition, Parent parent);
public abstract void onBindChildViewHolder(CVH childViewHolder, int parentPosition,
int childPosition, Object childListItem);
</BUG>
@Override

public int getItemCount() {
return mItems.size();
}
public abstract PVH onCreateParentViewHolder(ViewGroup parent, int parentType);
public abstract CVH onCreateChildViewHolder(ViewGroup child, int childType);
public abstract void onBindParentViewHolder(PVH parentViewHolder, int parentPosition, P parent);
public abstract void onBindChildViewHolder(CVH childViewHolder, int parentPosition,
int childPosition, C child);
@Override
