Whether to "stop" on an error, or to "remove' evaluations that raised an error.
envir
The environment in which to evaluate the method arguments. Note that this only applies to data when data is a call.
verbose
The level of verbosity. Either an object of class Verbose (see R.utils::Verbose for details),
a logical indicating whether to show basic computation information,
a numeric indicating the verbosity level (see Verbose),
or one of c('info', 'fine', 'finest').