in java/com/google/devtools/bazel/e4b/wizard/WorkspaceWizardPage.java [207:216]
private void updateControls() {
boolean enabled = !workspaceRoot.getText().isEmpty();
directories.getTree().setEnabled(enabled);
targets.setEnabled(enabled);
target.setEnabled(enabled);
addTargetButton.setEnabled(enabled && !target.getText().isEmpty());
removeTargetButton.setEnabled(enabled && targets.getSelectionCount() > 0);
setPageComplete(
enabled && (directories.getCheckedElements().length > 0) && (targets.getItemCount() > 0));
}