refactor CsvTableHelper

Author: vananiev

src/main/java/org/spacious_team/table_wrapper/csv/CsvTableHelper.java

@@ -31,7 +31,7 @@
 @NoArgsConstructor(access = PRIVATE)
 final class CsvTableHelper {
 
-    static TableCellAddress find(String[][] table, Object expected,
+    static TableCellAddress find(String[][] table, @Nullable Object expected,
                                  int startRow, int endRow,
                                  int startColumn, int endColumn) {
         return find(table, startRow, endRow, startColumn, endColumn, equalsPredicate(expected));

src/test/java/org/spacious_team/table_wrapper/csv/CsvTableHelperTest.java

@@ -41,7 +41,6 @@ void find() {
                         Integer.MIN_VALUE, Integer.MAX_VALUE, Integer.MIN_VALUE, Integer.MAX_VALUE));
         assertEquals(TableCellAddress.of(1, 0),
                 CsvTableHelper.find(table, 11, 0, 3, 0, 2));
-        //noinspection ConstantConditions
         assertEquals(TableCellAddress.of(2, 0),
                 CsvTableHelper.find(table, null, 0, 3, 0, 2));
         assertSame(TableCellAddress.NOT_FOUND,