func getFromArrayField(field *pb.Field, index int) (*pb.Field, error) {
fieldArr := field.GetArray()
if fieldArr == nil {
return nil, fmt.Errorf("field '%s' isn't an array, cannot access %s[%d]", field.Key, field.Key, index)
}
items := fieldArr.GetItems()
if items == nil {
return nil, fmt.Errorf("the array wrapper struct for the value of field '%s' had nil for items, cannot access %s[%d]", field.Key, field.Key, index)
} else if len(items)-1 < index {
return nil, fmt.Errorf("could not access %s[%d], the size of '%s' is %d", field.Key, index, field.Key, len(items))
}
return items[index], nil
}
