-spec end_span(opentelemetry:tracer(), opentelemetry:span_ctx()) -> boolean() | {error, term()}.

-spec noop_span_ctx() -> opentelemetry:span_ctx().

-spec start_span(otel_ctx:t(),
           opentelemetry:tracer(),
           opentelemetry:span_name(),
           otel_span:start_opts()) ->
              opentelemetry:span_ctx().

-spec with_span(otel_ctx:t(),
          opentelemetry:tracer(),
          opentelemetry:span_name(),
          otel_span:start_opts(),
          otel_tracer:traced_fun(T)) ->
             T.