vendor: github.com/prometheus/client_golang v1.12.1

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

vendor/go.opencensus.io/metric/metricproducer/producer.go

@@ -0,0 +1,28 @@
+// Copyright 2019, OpenCensus Authors
+//
+// 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 metricproducer
+
+import (
+	"go.opencensus.io/metric/metricdata"
+)
+
+// Producer is a source of metrics.
+type Producer interface {
+	// Read should return the current values of all metrics supported by this
+	// metric provider.
+	// The returned metrics should be unique for each combination of name and
+	// resource.
+	Read() []*metricdata.Metric
+}