check_error_measure_params: Checks if the argument is a valid error_measure parameters structure,
as created by create_error_measure_params.
Will stop if not.
Description
Checks if the argument is a valid error_measure parameters structure,
as created by create_error_measure_params.
Will stop if not.
parameter set to specify how the
error between the given phylogeny and the Bayesian
posterior is determined.
Use create_error_measure_params to create such
a parameter set