Allow traverse span tree

[stefanosiano]

Description

Should we provide an easy way to get the parent of a span (or directly the root span/transaction)?

This was asked by a customer who wants to attach custom spans to ui.load spans

[linear[bot]]

JAVA-163 Allow traverse span tree

[lcian]

Getting the current transaction should already be possible with Sentry.configureScope(scope -> scope.getTransaction());, maybe this is sufficient already.

[markushi]

Let's discuss this topic on a broader level, maybe we have some platforms which already expose APIs like the requested one.