content: package com.google.android.material.datepicker;
  
  import androidx.fragment.app.Fragment;
  import java.util.LinkedHashSet;
  
  abstract class PickerFragment<S> extends Fragment {
      protected final LinkedHashSet<OnSelectionChangedListener<S>> onSelectionChangedListeners = new LinkedHashSet<>();
  
      PickerFragment() {
      }
  
      /* access modifiers changed from: package-private */
      public boolean addOnSelectionChangedListener(OnSelectionChangedListener<S> onSelectionChangedListener) {
          return this.onSelectionChangedListeners.add(onSelectionChangedListener);
      }
  
      /* access modifiers changed from: package-private */
      public void clearOnSelectionChangedListeners() {
          this.onSelectionChangedListeners.clear();
      }
  
      /* access modifiers changed from: package-private */
      public abstract DateSelector<S> getDateSelector();
  
      /* access modifiers changed from: package-private */
      public boolean removeOnSelectionChangedListener(OnSelectionChangedListener<S> onSelectionChangedListener) {
          return this.onSelectionChangedListeners.remove(onSelectionChangedListener);
      }
  }
  