build_x_call() functionsFixes parameters provided in the build_x_call() functions
fix_parameter(param, before = NULL, ...)list; named list with the parameter name and value (e.g. list(settlement_date = "01/01/2020"))
function; function to fix the parameter. param will be passed as the first argument to this function.
Default NULL does nothing
additional arguments passed to the before function
modified param object (if before isn't NULL)
fix_all_parameters