private JComponent createComponentForChooseSources() {
    final JPanel panel = new JPanel(new GridBagLayout());
    mySourcePathsChooser = new ElementsChooser<>(true) {
      @Override
      public String getItemText(@NotNull JavaModuleSourceRoot sourceRoot) {
        String packagePrefix = sourceRoot.getPackagePrefix();
        return sourceRoot.getDirectory().getAbsolutePath() +
               (packagePrefix.isEmpty() ? "" : " (" + packagePrefix + ")") +
               " [" + sourceRoot.getRootTypeName() + "]";
      }
    };
    final String text = JavaUiBundle.message("label.java.source.files.have.been.found");
    final JLabel label = new JLabel(text);
    label.setUI(new MultiLineLabelUI());
    panel.add(label, new GridBagConstraints(0, GridBagConstraints.RELATIVE, 2, 1, 1.0, 0.0, GridBagConstraints.NORTHWEST, GridBagConstraints.HORIZONTAL,
                                            JBUI.insets(8, 10, 0, 10), 0, 0));
    panel.add(mySourcePathsChooser, new GridBagConstraints(0, GridBagConstraints.RELATIVE, 2, 1, 1.0, 1.0, GridBagConstraints.NORTHWEST, GridBagConstraints.BOTH,
                                                           JBInsets.create(8, 10), 0, 0));

    final JButton markAllButton = new JButton(JavaUiBundle.message("button.mark.all"));
    panel.add(markAllButton, new GridBagConstraints(0, GridBagConstraints.RELATIVE, 1, 1, 0.0, 0.0, GridBagConstraints.NORTHWEST, GridBagConstraints.NONE,
                                                    JBUI.insets(0, 10, 8, 2), 0, 0));

    final JButton unmarkAllButton = new JButton(JavaUiBundle.message("button.unmark.all"));
    panel.add(unmarkAllButton, new GridBagConstraints(1, GridBagConstraints.RELATIVE, 1, 1, 1.0, 0.0, GridBagConstraints.NORTHWEST, GridBagConstraints.NONE,
                                                      JBUI.insets(0, 0, 8, 10), 0, 0));

    markAllButton.addActionListener(__ -> mySourcePathsChooser.setAllElementsMarked(true));
    unmarkAllButton.addActionListener(__ -> mySourcePathsChooser.setAllElementsMarked(false));

    return panel;
  }
private JComponent createComponentForChooseSources()