8e22084c_Nucleus___Plugin_API_usPlugin__redefinable_methods__Explanation
[Method Signature] getMinNucleusVersion() [Explanation] 
(v2.0b) Returns the minimum required Nucleus version. By default, this returns 155 (v1.55). If you are using plugin features that were introduced later, please implement this function (e.g. v2.0 => 200). Please note that Nucleus v1.55 does not use this function at all, so it remains possible to install newer plugins there, even if they use newer features.
Nucleus - Plugin API
Explanation