public Properties getEnvironment() {
        return this.environment;
    }
Return the environment for the JNDI InitialContext, or <code>null</code> if none should be used.

@return the environment for the JNDI InitialContext, or <code>null</code> if none should be used.
core/src/main/java/org/apache/shiro/jndi/JndiTemplate.java