// unmarshalled into this ExportConfig object. The returned SpanExporters have
// not been started.
func (ec *exportConfig) SpanExporters() (map[SpanExporterType]otelsdktrace.SpanExporter, error) {
config.go
out := make(map[SpanExporterType]otelsdktrace.SpanExporter, len(ec.Exporters))
for _, expcfg := range ec.Exporters {
if !strings.HasPrefix(expcfg.Kind.Signal, "trace") {
continue