Importing objects when the class was placed in a package

Dear All,

Is it possible to load an object of which the class definition file was placed in separate package?

For example:

T = myTestClass;
save('T');

Now I want to place my class in a package, so I create the directory structure as follows:

+myTestPack/@myTestClass/myTestClass.m

Next I try to recover the saved object:

import myTestPack.*
load('T.mat');

The outcome is always:

 Warning: Variable 'T' originally saved as a myTestClass cannot be instantiated as an object and will be read in as a uint32.

Is there any way to solve this problem? I would like to restructure my code but a lot of old data was saved as objects. Maybe I need to add loadobj/saveobj methods to the definition file or maybe there is a way to rename the class from myTestClass to myTestPack.myTestClass?

Thank you for your suggestions!