code: /*
   * Copyright (c) 2022 Airbyte, Inc., all rights reserved.
   */
  
  package io.airbyte.commons.type;
  
  import java.util.Collections;
  import java.util.List;
  import java.util.Objects;
  import java.util.stream.Collectors;
  
  public class Types {
  
    /**
     * Convenience method converting a list to a list of lists of the same type. Each item in the
     * original list is inserted into its own list.
     */
    public static <T> List<List<T>> boxToListofList(final List<T> list) {
      final var nonNullEntries = list.stream().filter(Objects::nonNull);
      return nonNullEntries.map(Collections::singletonList).collect(Collectors.toList());
    }
  
  }
  