in bigquery/src/main/scala/magnolify/bigquery/TableRowType.scala [134:143]
override def fields(cm: CaseMapper): Seq[String] = {
for {
p <- caseClass.parameters
n = cm.map(p.label)
f <- p.typeclass match {
case r: Record[_] => r.fields(cm).map(child => n + "." + child)
case _ => Seq(n)
}
} yield f
}