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