er</code> value. The distance must be at least 0 or -1, if the default distance should
         be used</dd>
<dd><code>touchableArea</code> - The bounds of the onscreen area, which should be taken into consideration for
         recognizing the drag gesture, as an instance of the class <code>RectF</code> or null, if
         the area should not be restricted</dd>
</dl>
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