structSeries

Series structSeries(string name,  string[]  fieldNames,
       Series[]  fields)

@trusted

Builds a STRUCT Series from its field Series (equal lengths, ordered names).

`name`	the Series name
`fieldNames`	the ordered field names
`fields`	the field Series (same length each, order matching)

the single-chunk STRUCT Series (no parent nulls; field

nulls are the fields' own).