public boolean isSpanSslEnable() {
        return spanSslEnable;
    }
NOTE module accessibility
@see com.navercorp.pinpoint.bootstrap.java9.module.ModuleSupport#addPermissionToValueAnnotation(JavaModule)
@author Woonduk Kang(emeroad)
@author jaehong.kim
agent-module/profiler/src/main/java/com/navercorp/pinpoint/profiler/context/grpc/config/GrpcTransportConfig.java