feat: Inital commit

vendor/cloud.google.com/go/internal/btree/README.md

@@ -0,0 +1,11 @@
+This package is a fork of github.com/jba/btree at commit
+d4edd57f39b8425fc2c631047ff4dc6024d82a4f, which itself was a fork of
+github.com/google/btree at 316fb6d3f031ae8f4d457c6c5186b9e3ded70435.
+
+This directory makes the following modifications:
+
+- Updated copyright notice.
+- removed LICENSE (it is the same as the repo-wide license, Apache 2.0)
+- Removed examples_test.go and .travis.yml.
+- Added this file.
+

vendor/cloud.google.com/go/internal/btree/debug.go

@@ -0,0 +1,37 @@
+// Copyright 2014 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package btree
+
+import (
+	"fmt"
+	"io"
+	"strings"
+)
+
+func (t *BTree) print(w io.Writer) {
+	t.root.print(w, 0)
+}
+
+func (n *node) print(w io.Writer, level int) {
+	indent := strings.Repeat("   ", level)
+	if n == nil {
+		fmt.Fprintf(w, "%s<nil>\n", indent)
+		return
+	}
+	fmt.Fprintf(w, "%s%v\n", indent, n.items)
+	for _, c := range n.children {
+		c.print(w, level+1)
+	}
+}