preserve

inline fun <reified T> TraversePropertiesDsl.preserve()

Store values of the given type T in ValueColumns without transformation into ColumnGroups or FrameColumns.

For more information: See DataFrame from Iterable on the documentation website.


inline fun <reified T> CreateDataFrameDsl<*>.preserve()

Deprecated (with error)

Top-level `exclude`/`preserve` calls in `toDataFrame {}` are deprecated. Move them into each `properties { }` block to configure traversal instead. Will be ERROR in 1.0.