[NEST Users] Neuron Model for a Generalized LIF Neuron (No alpha or exponential shaped psc)

Hello NEST Users, I wanted to create a neural network with generalized LIF Neurons. I do not want any exponential or alpha shaped PSCs. Since I cannot draw to describe its shape, I am posting a link from google images to help understand what I mean by a generalized LIF. https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.researchgate.net%… Thanks in advance!