title: How to set/remove insets in JavaFX TitledPane
body: <p>I've created a TitledPane in JavaFX with a single child component (a button) as follows:</p>
  
  <pre><code>&lt;?import java.lang.*?&gt;
  &lt;?import javafx.scene.control.*?&gt;
  &lt;?import javafx.scene.layout.*?&gt;
  
  &lt;AnchorPane id="AnchorPane" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1"&gt;
      &lt;children&gt;
          &lt;TitledPane animated="false" layoutX="137.0" layoutY="60.0" prefHeight="400.0" prefWidth="600.0" text="untitled" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0"&gt;
              &lt;content&gt;
                  &lt;AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="180.0" prefWidth="200.0" &gt;
                      &lt;children &gt;
                          &lt;Button layoutX="193.1875" layoutY="133.5" mnemonicParsing="false" prefHeight="374.0" prefWidth="598.0" text="Button" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0" /&gt;
                      &lt;/children&gt;
                  &lt;/AnchorPane&gt;
              &lt;/content&gt;
          &lt;/TitledPane&gt;
      &lt;/children&gt;
  &lt;/AnchorPane&gt;
  </code></pre>
  
  <p>This appears as below. There is quite a bit a spacing around the button, I'd like to reduce this to either 0 or maybe, a single pixel. I don't see any property of either the AnchorPane or the TitledPane that will do this. Is there such a property?</p>
  
  <p><img src="https://i.stack.imgur.com/Us2rF.png" alt="enter image description here"></p>