https://solr.apache.org/docs/10_0_0/core/org/apache/solr/core/PluginBag.html
PluginBag (Solr 10.0.0 core API)
declaration: package: org.apache.solr.core, class: PluginBag
solrcoreapi
https://solr.apache.org/docs/10_0_0/core/org/apache/solr/core/PluginBag.PluginHolder.html
PluginBag.PluginHolder (Solr 10.0.0 core API)
declaration: package: org.apache.solr.core, class: PluginBag, class: PluginHolder
solrcoreapi