PortableHttpResponse (venice API)

```
public interface PortableHttpResponse
```
This interface exposes the commonalities between the Apache httpasyncclient and Netty and R2 client.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`containsHeader(java.lang.String headerName)`
`io.netty.buffer.ByteBuf`	`getContentInByteBuf()`	Returns the response as ByteBuf.
`java.lang.String`	`getFirstHeader(java.lang.String headerName)`
`int`	`getStatusCode()`

- Method Detail
  - getStatusCode
```
int getStatusCode()
```
    Returns:
    
    Status code of the response, like 200, 400, 500 etc.
  - getContentInByteBuf
```
io.netty.buffer.ByteBuf getContentInByteBuf()
                                     throws java.io.IOException
```
    Returns the response as ByteBuf.
    
    Returns:
    
    Throws:
    
    java.io.IOException
  - containsHeader
```
boolean containsHeader(java.lang.String headerName)
```
    Parameters:
    
    headerName -
    
    Returns:
    
    whether response contains header name specified in the parameters
  - getFirstHeader
```
java.lang.String getFirstHeader(java.lang.String headerName)
```
    Parameters:
    
    headerName -
    
    Returns:
    
    the value of the first header for header name specified in the parameters