ADD week 5

02-Easy5/E5/sources/com/google/android/material/datepicker/PickerFragment.java

@@ -0,0 +1,26 @@
+package com.google.android.material.datepicker;
+
+import androidx.fragment.app.Fragment;
+import java.util.LinkedHashSet;
+
+/* loaded from: classes.dex */
+abstract class PickerFragment<S> extends Fragment {
+    protected final LinkedHashSet<OnSelectionChangedListener<S>> onSelectionChangedListeners = new LinkedHashSet<>();
+
+    abstract DateSelector<S> getDateSelector();
+
+    PickerFragment() {
+    }
+
+    boolean addOnSelectionChangedListener(OnSelectionChangedListener<S> onSelectionChangedListener) {
+        return this.onSelectionChangedListeners.add(onSelectionChangedListener);
+    }
+
+    boolean removeOnSelectionChangedListener(OnSelectionChangedListener<S> onSelectionChangedListener) {
+        return this.onSelectionChangedListeners.remove(onSelectionChangedListener);
+    }
+
+    void clearOnSelectionChangedListeners() {
+        this.onSelectionChangedListeners.clear();
+    }
+}