Github user maropu commented on the issue:
https://github.com/apache/spark/pull/15257
I think it is difficult to support Seq and JList because of type erasure.
If it is possible to add a new interface below, we can support these types via
`ScalaReflection.schemaFor[T]`.
```
def create[T : TypeTag](v: T): Literal = {
val ScalaReflection.Schema(dataType, _) = ScalaReflection.schemaFor[T]
val convert = CatalystTypeConverters.createToCatalystConverter(dataType)
Literal(convert(v), dataType)
}
```
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