PUM – User Changeable calculated attribute

After the introduction of simple calculated attributes I had the need to introduce user changeable calculated attributes – with a default source code defined by the modelling tool – but via API calls the user can change this code with pure Smalltalk (so a compiled block is created and used to compute the result) or reset it back to the default code.

For the client side the output of these attributes look like read-only attributes.

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