I and D coefficient in PIDOptimizer

I wanted to understand the role of I, and D terms in PIDOptimizer. Do these signify the coefficients of integral and derivative term described in the paper? Is I coefficient of integral (momentum) term, and D a coefficient of the derivative term? Are these arguments same as K_I and K_D described in the paper?
If no, can you describe the role of arguments I and D in PIDOptimizer?

Thanks