Extracts native or suggested dimensions from file, which must be a vector file in the right format supported by
this.
It is considered a programming error to pass a file of invalid format.
| this |
the associated VectorLoadProcedure. |
| file |
a [iface@Gio.File] which can be processed by this. |
| data |
the returned dimension data. |
|
true if dimensions could be extracted. |