From b330bc51e1969b1e2284b120a47283d3dd0d8977 Mon Sep 17 00:00:00 2001
From: Ivan Topolnjak <ivantopo@gmail.com>
Date: Tue, 28 Nov 2017 01:01:48 +0100
Subject: simplify access to Span.ContextKey and Key builders for Java users

---
 kamon-core/src/main/scala/kamon/context/Context.scala | 2 +-
 kamon-core/src/main/scala/kamon/trace/Span.scala      | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/kamon-core/src/main/scala/kamon/context/Context.scala b/kamon-core/src/main/scala/kamon/context/Context.scala
index 18e77f5f..e0b084cb 100644
--- a/kamon-core/src/main/scala/kamon/context/Context.scala
+++ b/kamon-core/src/main/scala/kamon/context/Context.scala
@@ -74,7 +74,7 @@ object Context {
 }
 
 
-trait Key[T] {
+sealed abstract class Key[T] {
   def name: String
   def emptyValue: T
   def broadcast: Boolean
diff --git a/kamon-core/src/main/scala/kamon/trace/Span.scala b/kamon-core/src/main/scala/kamon/trace/Span.scala
index 16dc1d3d..ceb1f56c 100644
--- a/kamon-core/src/main/scala/kamon/trace/Span.scala
+++ b/kamon-core/src/main/scala/kamon/trace/Span.scala
@@ -23,7 +23,7 @@ import kamon.trace.SpanContext.SamplingDecision
 import kamon.util.Clock
 
 
-trait Span {
+sealed abstract class Span {
 
   def isEmpty(): Boolean
   def isLocal(): Boolean
-- 
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