Bug 29698 drag and drop of java files between packages in package explorer doesn't work
the <preview> <ok> <cancel> dialog shows up, but <ok> has the same effect as <cancel> and <preview> would only show movements of files and no changes in imports of other java files. on <ok> in the preview it only moves the file(s) (as indicated ) without changing referencing imports.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/refactoring/RenameSupport.java
return (flags & UPDATE_JAVADOC_COMMENTS) != 0;
	}
	
	private static boolean updateRegularComments(int flags) {
		return (flags & UPDATE_REGULAR_COMMENTS) != 0;
	}
	
	private static boolean updateStringLiterals(int flags) {
		return (flags & UPDATE_STRING_LITERALS) != 0;
	}
	
	private static boolean updateGetterMethod(int flags) {
		return (flags & UPDATE_GETTER_METHOD) != 0;
	}
	
	private static boolean updateSetterMethod(int flags) {
		return (flags & UPDATE_SETTER_METHOD) != 0;
	}
	
	private void ensureChecked() throws CoreException {
		if (fPreCheckStatus == null)
			fPreCheckStatus= fSupport.lightCheck();
	}
	
	private void showInformation(Shell parent, RefactoringStatus status) {
		String message= status.getFirstMessage(RefactoringStatus.FATAL);
		MessageDialog.openInformation(parent, fSupport.getRefactoring().getName(), message);
	}
}