private JPanel createWorkPanel(String text) {
		workPanel = new JPanel(new BorderLayout());

		textArea = new JTextArea(10, 80);
		textArea.setText(text);
		textArea.setEditable(false);
		textArea.getAccessibleContext().setAccessibleName("Text");
		textArea.setMargin(new Insets(5, 5, 5, 5));
//        textArea.setFont(font);
		DockingUtils.setTransparent(textArea);
		textArea.setCaretPosition(0);
		JScrollPane scrolledDetails = new JScrollPane(textArea);
		scrolledDetails.getAccessibleContext().setAccessibleName("Details");
		workPanel.add(scrolledDetails, BorderLayout.CENTER);
		workPanel.getAccessibleContext().setAccessibleName("Read Text");
		return workPanel;
	}
Set the text in the text area.
Ghidra/Framework/Docking/src/main/java/docking/widgets/dialogs/ReadTextDialog.java