<VBox fx:controller="lab2.Controller"
          xmlns:fx="http://javafx.com/fxml" alignment="center">
    <TreeView fx:id="treeView"></TreeView>
    <FlowPane hgap="20">
        <padding><Insets top="5" right="0" bottom="0" left="0"/></padding>
        <Button fx:id="chooseBtn" onAction="#changeRootButtonAction">Choose Root</Button>
        <Button fx:id="deleteBtn" onAction="#deleteFileButtonAction">Delete file!</Button>
        <TextField fx:id="filenameField"></TextField>
    </FlowPane>
</VBox>