title: Cannot resolve for method show(android.app.FragmentManager, java.lang.String)
body: <p>I've on API 23.Using <code>RadialTimePickerDialogFragment</code> that uses v4 
  The parent activity is based on Activity (we don't need </p>
  
  <p>Why am I getting</p>
  
  <blockquote>
    <p>Cannot resolve for method show(android.app.FragmentManager,
    java.lang.String)</p>
  </blockquote>
  
  <pre><code>import com.codetroopers.betterpickers.radialtimepicker.RadialTimePickerDialogFragment;
  import android.support.v4.app.DialogFragment;
  
  import com.gtfp.workingmemory.BuildConfig;
  import com.gtfp.workingmemory.R;
  import com.gtfp.workingmemory.colorPicker.colorPickerActivity;
  import com.gtfp.workingmemory.colorPicker.colorPickerView;
  import com.gtfp.workingmemory.frmwrk.frmwrkActivity;
  import com.gtfp.workingmemory.settings.SettingsActivity;
  import com.gtfp.workingmemory.settings.appSettings;
  import com.gtfp.workingmemory.todo.ToDoAlarm;
  import com.gtfp.workingmemory.todo.ToDoItem;
  
  import android.app.Activity;
  import android.app.Dialog;
  import android.content.Context;
  import android.content.Intent;
  import android.content.SharedPreferences;
  import android.os.Bundle;
  import android.view.View;
  import android.view.View.OnClickListener;
  import android.view.Window;
  import android.view.inputmethod.InputMethodManager;
  import android.widget.Button;
  import android.widget.DatePicker;
  import android.widget.ImageButton;
  import android.widget.RadioButton;
  import android.widget.TextView;
  import android.widget.TimePicker;
  import android.widget.Toast;
      :
      :
      :
      :
       RadialTimePickerDialogFragment rtpd = new RadialTimePickerDialogFragment()
                              .setOnTimeSetListener(editToDoItem.this)
                              .setStartTime(10, 10)
                              .setThemeDark();
  
                      rtpd.show(getFragmentManager(), FRAG_TAG_TIME_PICKER);
  </code></pre>