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Brave core.

There is a newer version: 4.13.6

package com.github.kristofa.brave;

import com.github.kristofa.brave.internal.Nullable;
import com.twitter.zipkin.gen.Span;

abstract class CurrentSpan { // intentionally not public

  /**
   * Returns the implicit span associated with the current context, or null if there is none.
   *
   * This is used by {@linkplain LocalTracer}, {@linkplain LocalTracer}
   *
   * @return Span to which to add annotations. Can be null. In that case the different
   * submit methods will not do anything.
   */
  @Nullable abstract Span get(); // intentionally package protected
}