As described in
1) Copies a file - either from their OS, or FDT Explorer using 'Copy'.
2) Instead of using Paste they can use 'Paste and Refactor'.
3) If the File is a valid file (.AS, .MXML) it will attempted to fix anything it can - such as import statements.
4) If not, then a pop up displays informing that either the file is of wrong type for refactoring, or refactoring failed.