Simplest way to draw single IIR Filter curve in AudioPlugin

Hi All!
I’m finishing my Filter Delay plugin in which I used the DSP IIR Filter from Juce.
Now I need to plot in a graph a single line of the effect curve. What is the simplest way to do that?

You can use the dsp::IIR::Coefficients::getMagnitudeForFrequencyArray(). Also use the forum search, there are several recent threads with more details.