in lib/skywalking/tracing_context.lua [136:148]
function _M.createEntrySpan(tracingContext, operationName, parent, contextCarrier)
if tracingContext.is_noop then
return Span.newNoOP()
end
local correlationData = ''
if contextCarrier then
correlationData = contextCarrier[CONTEXT_CORRELATION_KEY]
end
tracingContext.correlation = CorrelationContext.fromSW8Value(correlationData)
return Span.createEntrySpan(operationName, tracingContext, parent, contextCarrier)
end