In MSVS this is a very useful feature.
It allows to pin a watch to the source editor.
See small description here (tip 3)
In general when you pin a watch to the source editor it stays there (pair name|value) and scrolls together with sources. It allows to quickly observe required variable values while debugging.
Unfortunately, it will not make it into 7.4.
this feature we would like to see implemented in the upcoming release. Be based on our experience and feedback from users, we think it will be useful and desired feature both from NetBeans and Studio prospective. Is there any chance that it can get into 8.1?
NetBeans should provide the ability to export and import the set of pinnable watches so these could be used by different developers for same project.
Pin watches are there, the debugger_pin_watch branch is merged into trunk:
Integrated into 'main-silver', will be available in build *201604200001* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress)
Log: #215073: Pin watches added into node.js debugger.