ProxyServerSelector (AHC/Client 3.0.0.Beta3 API)

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
public interface ProxyServerSelector
```
Selector for a proxy server

- Field Summary
  
  Fields
  Modifier and Type Field Description
  
  static ProxyServerSelector NO_PROXY_SELECTOR
  A selector that always selects no proxy.
- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  @Nullable ProxyServer select(Uri uri)
  Select a proxy server to use for the given URI.

- Field Detail
  - NO_PROXY_SELECTOR
```
static final ProxyServerSelector NO_PROXY_SELECTOR
```
    A selector that always selects no proxy.
- Method Detail
  - select
```
@Nullable
@Nullable ProxyServer select(Uri uri)
```
    Select a proxy server to use for the given URI.
    
    Parameters:
    
    uri - The URI to select a proxy server for.
    
    Returns:
    
    The proxy server to use, if any. May return null.