Name,Email,Age,Department
John Doe,******@****.***,30,Engineering
Jane Smith,******@****.***,28,Marketing
Bob Johnson,******@****.***,35,Sales

        // Verify data extraction
        assertTrue(content.contains("John Doe"));
        assertTrue(content.contains("******@****.***"));
        assertTrue(content.contains("Engineering"));
    }

    public void test_columnMetadata() {
        final InputStream in = ResourceUtil.getResourceAsStream("extractor/csv/test.csv");
        final ExtractData extractData = csvExtractor.getText(in, null);

2. Write implementation following existing patterns
3. Add comprehensive tests
4. Run `mvn formatter:format license:format test`
5. Update JavaDoc for changed/new classes

**Principles:**
- Avoid over-engineering - keep solutions simple
- Only expose necessary public APIs
- Validate parameters with `Objects.requireNonNull()`
- Provide detailed error messages with context
- Add logging with contextual information