clarify e -> AnActionEvent

topics/basics/architectural_overview/psi_elements.md

@@ -13,7 +13,7 @@ The [`PsiElement`](upsource:///platform/core-api/src/com/intellij/psi/PsiElement
 
 ## How do I get a PSI element?
 
-* From an Action: `e.getData(CommonDataKeys.PSI_ELEMENT)`.
+* From an Action: `AnActionEvent.getData(CommonDataKeys.PSI_ELEMENT)`.
   Note: if an editor is currently open and the element under caret is a [reference](psi_references.md), this will return the result of resolving the reference.
   This may or may not be what you need.
 * From a file by offset: `PsiFile.findElementAt()`.

topics/basics/architectural_overview/psi_files.md

@@ -10,7 +10,7 @@ Unlike `VirtualFile` and `Document`, which have application scope (even if multi
 
 ## How do I get a PSI file?
 
-* From an Action: `e.getData(CommonDataKeys.PSI_FILE)`.
+* From an Action: `AnActionEvent.getData(CommonDataKeys.PSI_FILE)`.
 * From a VirtualFile: `PsiManager.getInstance(project).findFile()`
 * From a Document: `PsiDocumentManager.getInstance(project).getPsiFile()`
 * From an element inside the file: `PsiElement.getContainingFile()`

topics/basics/architectural_overview/virtual_file.md

@@ -13,7 +13,7 @@ Contents of a `VirtualFile` are treated as a stream of bytes, but concepts like
 ## How do I get a virtual file?
 
 #### From an Action
-`e.getData(PlatformDataKeys.VIRTUAL_FILE)` or `e.getData(PlatformDataKeys.VIRTUAL_FILE_ARRAY)` for multiple selection
+`AnActionEvent.getData(PlatformDataKeys.VIRTUAL_FILE)` or `AnActionEvent.getData(PlatformDataKeys.VIRTUAL_FILE_ARRAY)` for multiple selection
 
 #### From Path in Local File System
 - `LocalFileSystem.getInstance().findFileByIoFile()`