HeadersExtractor (co.elastic.apm:apm-agent-api 1.16.0 API)

```
public interface HeadersExtractor
```
Used to extract all header values with a specific header name.
Useful for protocols such as HTTP which allow that a header can have multiple values.

Can be implemented as a lambda in Java 8 and as an anonymous inner class in Java 7.

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  Iterable<String> getAllHeaders(String headerName)
  Returns all values of the provided header name

- Method Detail
  - getAllHeaders
```
Iterable<String> getAllHeaders(String headerName)
```
    Returns all values of the provided header name
    
    Parameters:
    
    headerName - the name of the header to extract
    
    Returns:
    
    all values of the provided header name