Initial QSfera import

Server/vendor/github.com/open-policy-agent/opa/ast/schema.go

@@ -0,0 +1,17 @@
+// Copyright 2021 The OPA Authors.  All rights reserved.
+// Use of this source code is governed by an Apache2
+// license that can be found in the LICENSE file.
+
+package ast
+
+import (
+	v1 "github.com/open-policy-agent/opa/v1/ast"
+)
+
+// SchemaSet holds a map from a path to a schema.
+type SchemaSet = v1.SchemaSet
+
+// NewSchemaSet returns an empty SchemaSet.
+func NewSchemaSet() *SchemaSet {
+	return v1.NewSchemaSet()
+}