where can I find source of com.android.internal.R.styleable.AlertDialog_multiChoiceItemLayout?

I want to modify Alert dialog multi select layout. For my program I want two line multi-select item. I have searched in source code and found following code snippet. Now I am unable to find where is the source code of following layouts. Please help me.

public AlertController(Context context, DialogInterface di, Window window) {
    mContext = context;
    mDialogInterface = di;
    mWindow = window;
    mHandler = new ButtonHandler(di);

    TypedArray a = context.obtainStyledAttributes(null,
            com.android.internal.R.styleable.AlertDialog,
            com.android.internal.R.attr.alertDialogStyle, 0);

    mAlertDialogLayout = a.getResourceId(com.android.internal.R.styleable.AlertDialog_layout,
            com.android.internal.R.layout.alert_dialog);
    mListLayout = a.getResourceId(
            com.android.internal.R.styleable.AlertDialog_listLayout,
            com.android.internal.R.layout.select_dialog);
    mMultiChoiceItemLayout = a.getResourceId(
            com.android.internal.R.styleable.AlertDialog_multiChoiceItemLayout,
            com.android.internal.R.layout.select_dialog_multichoice);
    mSingleChoiceItemLayout = a.getResourceId(
            **com.android.internal.R.styleable.AlertDialog_singleChoiceItemLayout**,
            com.android.internal.R.layout.select_dialog_singlechoice);
    mListItemLayout = a.getResourceId(
            com.android.internal.R.styleable.AlertDialog_listItemLayout,
            com.android.internal.R.layout.select_dialog_item);

    a.recycle();
}

The file is called "select_dialog_multichoice" and located inside the layout folder. The absolute path on my machine looks like this:

C:\Users\d053380\AppData\Local\Android\android-sdk\platforms\android-14\data\res\layout