# Objective
This PR aims to fix a handful of problems with the `SpatialBundle` docs:
The docs describe the role of the single components of the bundle,
overshadowing the purpose of `SpatialBundle` itself. Also, those items
may be added, removed or changed over time, as it happened with #9497,
requiring a higher maintenance effort, which will often result in
errors, as it happened.
## Solution
Just describe the role of `SpatialBundle` and of the transform and
visibility concepts, without mentioning the specific component types.
Since the bundle has public fields, the reader can easily click them and
read the documentation if they need to know more. I removed the mention
of numbers of components since they were four, now they are five, and
who knows how many they will be in the future. In this process, I
removed the bullet points, which are no longer needed, and were
contextually wrong in the first place, since they were meant to list the
components, but ended up describing use-cases and requirements for
hierarchies.
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Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>
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