FIX: Cannot invoke "com.intellij.openapi.editor.Document.getText()" because "document" is null #388

Author: SeeSharpSoft

src/main/java/net/seesharpsoft/intellij/plugins/csv/intention/CsvShiftColumnIntentionAction.java

@@ -24,6 +24,8 @@ protected static void changeLeftAndRightColumnOrder(@NotNull Project project,
                                                         CsvColumnInfo<PsiElement> leftColumnInfo,
                                                         CsvColumnInfo<PsiElement> rightColumnInfo) {
         Document document = PsiDocumentManager.getInstance(project).getDocument(csvFile);
+        if (document == null) return;
+
         document.setText(
                 changeLeftAndRightColumnOrder(document.getText(), CsvHelper.getValueSeparator(csvFile), leftColumnInfo, rightColumnInfo)
         );