code: function getCompositeTypes(str){
    var type = getInnerType(str);
    if (type === str) {
      return getType(str);
    }
  
    var types = type.split(','),
        i = 0, ret = [], typeLength = types.length;
  
    for(; i < typeLength; i += 1){
      ret.push( parseTypeString(types[i]) );
    }
  
    return ret;
  }
docs: Returns an array of types for composite columns
  @private
  @memberOf Marshal