Vendor dependencies

vendor/github.com/aws/smithy-go/trait.go

@@ -0,0 +1,21 @@
+package smithy
+
+// Trait represents a trait applied to a shape in a Smithy model. Traits
+// related to (de)serialization are included in code-generated Schemas for the
+// client.
+type Trait interface {
+	TraitID() ShapeID
+}
+
+// IndexableTrait is optionally implemented by Trait values that have a
+// reserved index in Schema's indexed trait slice. All traits defined in the
+// traits package implement this interface.
+//
+// You SHOULD NOT implement this outside of a smithy-go trait unless you know
+// what you are doing. If you implement this and return a value that collides
+// with one of the primary serde-based indexed traits (see index.go) you will
+// probably break something.
+type IndexableTrait interface {
+	Trait
+	TraitIndex() int
+}