FIX: Change alt.method to core.method in topo_feature
@@ -876,5 +876,5 @@ def topo_feature(url, feature, **kwargs):
**kwargs :
additional keywords passed to TopoDataFormat
"""
- return alt.UrlData(url=url,format=alt.TopoDataFormat(type='topojson',
+ return core.UrlData(url=url,format=core.TopoDataFormat(type='topojson',
feature=feature, **kwargs))
