sem: drop ImportDeclaration>[leadingComments trailingComments]

Signed-off-by: Alexander Bezzubov <[email protected]>

Author: bzz

driver/normalizer/normalizer.go

@@ -74,6 +74,26 @@ var Preprocessors = []Mapping{
 			uast.KeyType: String("ImportNamespaceSpecifier"),
 		}),
 	),
+	// FIXME(bzz): make sure such comments are mapped properly
+	Map(
+		Part("_", Obj{
+			uast.KeyType: String("ImportDeclaration"),
+			"leadingComments": Any(),
+		}),
+		Part("_", Obj{
+			uast.KeyType: String("ImportDeclaration"),
+		}),
+	),
+	// FIXME(bzz): make sure such comments are mapped properly
+	Map(
+		Part("_", Obj{
+			uast.KeyType: String("ImportDeclaration"),
+			"trailingComments": Any(),
+		}),
+		Part("_", Obj{
+			uast.KeyType: String("ImportDeclaration"),
+		}),
+	),
 }
 
 // Normalizers is the main block of normalization rules to convert native AST to semantic UAST.
@@ -141,6 +161,9 @@ var Normalizers = []Mapping{
 			"Path": Var("path"),
 		},
 	)),
+	// importKind switch, set only by flow plugin
+	// https://github.com/babel/babel/blob/master/packages/babel-parser/ast/spec.md#importdeclaration
+	// TODO(bzz): this mapping misses 'typeof' case
 	MapSemantic("ImportDeclaration", uast.Import{}, MapObj(
 		CasesObj("case",
 			// common