Get the value for the {@code testOnReturn} configuration attribute for pools created with this configuration instance.
@return The current setting of {@code testOnReturn} for this configuration instance
@see GenericObjectPool#getTestOnReturn() @see GenericKeyedObjectPool#getTestOnReturn()
See Implementation
Get the value for the {@code testOnReturn} configuration attribute for pools created with this configuration instance.
@return The current setting of {@code testOnReturn} for this configuration instance
@see GenericObjectPool#getTestOnReturn() @see GenericKeyedObjectPool#getTestOnReturn()