lib/marshalingCommands.js
function marshalList(item, marshal) {
  return transform(_.isArray, _.compose(objOf('L'), _.map(marshal)), item);
}
function marshalList(item, marshal) {
  return transform(_.isArray, _.compose(objOf('L'), _.map(marshal)), item);
}
function marshalList ( item , marshal ) { return transform ( _ . isArray , _ . compose ( objOf ( 'L' ) , _ . map ( marshal ) ) , item ) ; }
Converts mixed array to DynamoDb "L"

@param item
@param marshal
@returns {*}
Converts mixed array to DynamoDb L