Changes the SpanReference class in order to be more flexible.

opentracing / opentracing-php

OpenTracing API for PHP

Apache License 2.0

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Closed jcchavezs closed 7 years ago

jcchavezs commented 7 years ago

This PR replaces the SpanReference interface and removes the ChildOf and FollowsFrom class seeking for a flexible SpanReference API.

Ping @felixfbecker @yurishkuro @felixfbecker

Relates to #5

yurishkuro commented 7 years ago

lgtm from high-level OT API viewpoint.