[5.85] processAmount() will be removed from core
Call to deprecated method processAmount() of class CRM_Price_BAO_PriceSet:
since 5.69 will be removed around 5.85. This function is still in use but marking deprecated to make it clear that
we are moving away from it. There is no function that has the guaranteed stable signature
that would allow us to support if from outside of core so if using this or the core alternative
from an extension you need to rely on unit tests to keep your code stable. Within core we
already have good test cover on code that calls this.