code: void setEPStatement(EPStatement epStatement) {
  		this.epStatement = epStatement;
  		if (this.subscriber != null) {
  			epStatement.setSubscriber(this.subscriber);
  		} else {
  			for (UpdateListener listener : listeners) {
  				epStatement.addListener(listener);
  			}
  		}
  	}
docs: Sets the native Esper statement. Typically created by an Esper Template.
  
  @param epStatement
  the underlying native Esper statement
  @see org.opencredo.esper.EsperTemplate