package com.easypost;

public abstract class EasyPost
{
	public static final String API_BASE = "https://api.easypost.com/v2";
	public static final String VERSION = "2.1.0";
	public static String apiKey;
	public static String apiVersion;
}

package com.easypost;

public abstract class EasyPost
{
	public static String API_BASE = "https://api.easypost.com/v2";
	public static final String VERSION = "2.1.0";
	public static String apiKey;
	public static String apiVersion;
}

Make API_BASE configurable