The fields of the content of a .mapjson file that this version does not know, by their path, e.g.
elements[3].style.shadow; and elements of an unknown type, e.g. elements[4]. They are allowed
(e.g. from a newer version, which may add fields), but stateFromMapJSON does not keep them, so
the editor warns about them. The options of the background map are those of @versatiles/style,
which are not checked here.
The fields of the content of a .mapjson file that this version does not know, by their path, e.g.
elements[3].style.shadow; and elements of an unknown type, e.g.elements[4]. They are allowed (e.g. from a newer version, which may add fields), butstateFromMapJSONdoes not keep them, so the editor warns about them. Theoptionsof the background map are those of@versatiles/style, which are not checked here.