function getLabelAttr(semantic) {
  if (semantic.$instanceOf('bpmn:FlowElement') ||
      semantic.$instanceOf('bpmn:Participant') ||
      semantic.$instanceOf('bpmn:Lane') ||
      semantic.$instanceOf('bpmn:SequenceFlow') ||
      semantic.$instanceOf('bpmn:MessageFlow')) {
    return 'name';
  }

  if (semantic.$instanceOf('bpmn:TextAnnotation')) {
    return 'text';
  }
}

module.exports.getLabel = function(semantic) {
  var attr = getLabelAttr(semantic);

  if (attr) {
    return semantic[attr] || '';
  }
};


module.exports.setLabel = function(semantic, label) {
  var attr = getLabelAttr(semantic);

  if (attr) {
    semantic[attr] = label;
  }
};