package org.springframework.cloud.sleuth;
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import org.checkerframework.checker.nullness.qual.Nullable;
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import org.springframework.cloud.sleuth.Sampler;
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import org.springframework.cloud.sleuth.Span;
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interface Tracer {
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@Nullable Span close(@Nullable Span span);
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@Nullable Span continueSpan(@Nullable Span span);
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@Nullable Span createSpan(String name);
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@Nullable Span createSpan(String name, @Nullable Sampler sampler);
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@Nullable Span createSpan(String name, @Nullable Span parent);
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@Nullable Span detach(@Nullable Span span);
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@Nullable Span getCurrentSpan();
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}
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class Span {
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Span (Span span, @Nullable Span parent);
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}
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