–– Pkl Error ––
Cannot iterate over value of type `Null`.

x | res { ...source }
             ^^^^^^
at spreadSyntaxNullValue#res (file:///$snippetsDir/input/errors/spreadSyntaxNullValue.pkl)

To guard against a nullable value, use `...?` instead of `...`.
Try: `...?source`

xxx | renderer.renderDocument(value)
      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
at pkl.base#Module.output.text (pkl:base)

xxx | if (renderer is BytesRenderer) renderer.renderDocument(value) else text.encodeToBytes("UTF-8")
                                                                         ^^^^
at pkl.base#Module.output.bytes (pkl:base)
