Where can I find synaptic calcium concentration values in this simulation?

Hi,
Thank you for sharing the code! It is very interesting works.
Based on what I've read from your papers, it seems like this GitHub repository is a simulation of how pre-synaptic spikes influence synaptic calcium concentration, and how this calcium concentration affects synaptic efficacy, ultimately leading to variations in the magnitude of EPSP.
However, no matter how hard I look, I can't find the part related to calcium concentration.

The calcium-related code I found only involves setting the depression and potentiation thresholds with C_pre and C_post.
(https://github.com/BlueBrain/EModelRunner/blob/main/emodelrunner/synapses/glusynapse.py)

Could you kindly tell me that which code is related to mapping of pre-synaptic spikes to synaptic calcium concentration?

Thank you so much!

Sincerely, Stella.