A small structure to specify options for the checks in CheckGroup.
- step is the increment that will be taken for finite difference schemes
- prec is the precision with which the equality of two vectors is tested. It corresponds to the prec parameter of Eigen's isApprox method.
- if verbose is true, the functions will display some indications when a mismatch is detected.
- if samples is > 0 then the check will generate samples random configurations, defaults to 1 if configs is empty, 0 otherwise
- if configs are provided then these specific configurations are also tested, see CheckOptions::CheckConfiguration