gistfile1.txt

childNodeFromParent: function(parentNode: TaxonomyNode, partialChild: Map<string, any>): Map<string, any> {
 if (!partialChild.has("name")) {
   throw Error("partialChild must contain a name key");
 }

 let newName = partialChild.get("name");

src/data/taxonomy.js:1238
1238:     let newName = partialChild.get("name");
                        ^^^^^^^^^^^^^^^^^^^^^^^^ call of method `get`. Function cannot be called on
1238:     let newName = partialChild.get("name");
                        ^^^^^^^^^^^^^^^^^^^^^^^^ intersection: polymorphic type: function type(s)