var whitespace = false
      afterBoundaryLoop@while (true) {
        when (source.select(afterBoundaryOptions)) {
          0 -> {
            // "\r\n": We've found a new part.
            partCount++
            break@afterBoundaryLoop
          }

          1 -> {
            // "--": No more parts.

    val headers =
      Headers
        .Builder()
        .add("foo: bar")
        .add(" foo: baz") // Name leading whitespace is trimmed.
        .add("foo : bak") // Name trailing whitespace is trimmed.
        .add("\tkey\t:\tvalue\t") // '\t' also counts as whitespace
        .add("ping:  pong  ") // Value whitespace is trimmed.
        .add("kit:kat") // Space after colon is not required.
        .build()

            return Stream.of(
                    Arguments.of(null, "null version"),
                    Arguments.of("", "empty version"),
                    Arguments.of("   ", "whitespace-only version"),
                    Arguments.of("4", "incomplete version (major only)"),
                    Arguments.of("4.0", "incomplete version (major.minor only)"),

Fixer tool expects comments that follow specific pattern:

- For hash-style comments: comment starts with `# ` (hash following by whitespace) in the beginning of the string or after a whitespace.
- For slash-style comments: comment starts with `// ` (two slashes following by whitespace) in the beginning of the string or after a whitespace.

If comment doesn't follow this pattern, fixer tool will not preserve it.

```python
#Function declaration

                "word1\n" + "  \n" + // whitespace line (may be treated as content)
                "# Another comment\n" + "word2\n";

        // Write content to test file
        writeTestFile(content);

        // Reload and verify
        protwordsFile.reload(null);

        PagingList<ProtwordsItem> result = protwordsFile.selectList(0, 10);
        // Whitespace-only lines may be treated as entries

   * of several definitions of "whitespace"</a>.)
   *
   * <p>All Unicode White_Space characters are on the BMP and thus supported by this API.
   *
   * <p><b>Note:</b> as the Unicode definition evolves, we will modify this matcher to keep it up to
   * date.
   *
   * @since 19.0 (since 1.0 as constant {@code WHITESPACE})
   */
  public static CharMatcher whitespace() {
    return Whitespace.INSTANCE;
  }

        sb.append((char) (base + offset));
      }
    }
    ALL_DIGITS = sb.toString();
  }

  /** Sample CharMatcher instances for benchmarking. */
  public enum SampleMatcherConfig {
    WHITESPACE(CharMatcher.whitespace(), WHITESPACE_CHARACTERS),
    HASH(CharMatcher.is('#'), "#"),
    ASCII(CharMatcher.ascii(), ASCII_CHARACTERS),
    WESTERN_DIGIT("0123456789"),
    ALL_DIGIT(CharMatcher.digit(), ALL_DIGITS),

        return new CopyOptions().excludeNull();
    }

    /**
     * Returns a {@link CopyOptions} that excludes properties with whitespace values from the operation.
     *
     * @return A {@link CopyOptions} that excludes properties with whitespace values from the operation.
     * @see CopyOptions#excludeWhitespace()
     */
    public static CopyOptions excludeWhitespace() {

    @DisplayName("Edge Cases")
    class EdgeCases {

        @Test
        @DisplayName("should handle POM with only whitespace elements")
        void shouldHandlePOMWithWhitespaceElements() throws Exception {
            String pomXml = PomBuilder.create()
                    .groupId("   ") // whitespace-only groupId
                    .artifactId("test-project")
                    .version("1.0.0")
                    .build();

        // Test with whitespace around keys and values
        value = "  key1  =  value1  \n  key2=value2\n";
        paramMap = ParameterUtil.parse(value);
        assertEquals(2, paramMap.size());
        assertEquals("value1", paramMap.get("key1"));
        assertEquals("value2", paramMap.get("key2"));

        // Test with empty lines and mixed whitespace
        value = "key1=value1\n\n\t\nkey2=value2\n \n";