Unable to import GraphML (.gml) file for preview

I tried to call the PreviewJFrame script in https://github.com/gephi/gephi-toolkit-demos/blob/master/src/main/java/org/gephi/toolkit/demos/PreviewJFrame.java

directly using the below .gml file, but on executing, it shows # Nodes loaded:0 # Edges loaded: 0, when actually my toy file contains 1 node as can be seen.

I have attached the .gml file for reproducing here below:

```

:HostH1000

```

Start with src/main/java/org/gephi/toolkit/demos/PreviewJFrame.java and run it with the supplied GraphML file. Inspect the preview/import path to determine why the file reports zero nodes and edges; done means the example loads the one node described in the issue.

Written by the indexing model from the issue text.