Returns <code>true</code> if the text layout has been disposed,
and <code>false</code> otherwise.
<p>
This method gets the dispose state for the text layout.
When a text layout has been disposed, it is an error to
invoke any other method using the text layout.
</p>
@return <code>true</code> when the text layout is disposed and <code>false</code> otherwise
Returns <code>true</code> if the text layout has been disposed, and <code>false</code> otherwise. <p> This method gets the dispose state for the text layout. When a text layout has been disposed, it is an error to invoke any other method using the text layout. </p>
@return <code>true</code> when the text layout is disposed and <code>false</code> otherwise