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kotlinlang

Hi! I am trying to set up a standalone environment to play around with building a language server. I am new to the compiler internals, and I know that `KotlinCoreProjectEnvironment#project` can be used to obtain services (`PsiManager`, `PsiFileFactory`...). But I am wondering whether the `KotlinCoreProjectEnvironment` is a one-time use only so that when any files in a root directory change, the whole environment needs to be recreated. I can obtain a `PsiFile` instance through `PsiManager` but I cannot call `PsiManager#reloadFromDisk` when a file change because that throws `Missing extension point: com.intellij.psi.treeChangePreprocessor in container com.intellij.mock.MockProject@4a8355dd` .Am I doing this wrong or are there other ways to do it?  It also seems that I can only add a root (as a directory or a jar) through `JavaCoreProjectEnvironment#addSourcesToClassPath` or `JavaCoreProjectEnvironment#addJarToClassPath` but cannot remove them. I tried looking into `intellij-community` and it seems to use a `ProjectExImpl` instance but not sure where it registers all its services or how it manages text changes in a file. Any help would be appreciated!