Currently I am only able to set the the number of threads via "stack_threads" option like this.

JBP_CONFIG_OPEN_JDK_JRE: "{memory_calculator: { stack_threads: 40 }}"

It would be nice to also set the number of loaded classes via "class_count" option (it already exists in the memory calculator).

Example:
JBP_CONFIG_OPEN_JDK_JRE: "{memory_calculator: { stack_threads: 40, class_count: 1000 }}"