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contextApi.active();\n    const span = this.startSpan(name, opts, parentContext);\n    const contextWithSpanSet = setSpan(parentContext, span);\n\n    return contextApi.with(contextWithSpanSet, fn, undefined, span);\n  }\n}\n\nfunction isSpanContext(spanContext: any): spanContext is SpanContext {\n  return (\n    typeof spanContext === 'object' &&\n    typeof spanContext['spanId'] === 'string' &&\n    typeof spanContext['traceId'] === 'string' &&\n    typeof spanContext['traceFlags'] === 'number'\n  );\n}\n"]}