docs: function parseObjectExpressions(node) {
      if (!node || node.type !== 'ObjectExpression') {
        return {};
      }
      var properties = {}, property;
      for (var i = 0; i < node.properties.length; i++) {
        property = node.properties[i];
        if (property.key.type === 'Identifier' && property.value.type === 'Literal') {
          properties[property.key.name] = property.value.value;
        }
      }
      return properties;
    }