Activities for displaying messages preceded by the simulation time and the name of the arrival, and for setting conditional breakpoints.

log_(.trj, message, level = 0)

stop_if(.trj, condition)

## Arguments

.trj the trajectory object. the message to display, accepts either a string or a callable object (a function) which must return a string. debugging level. The message will be printed if, and only if, the level provided is less or equal to the log_level defined in the simulation environment (see simmer). a boolean or a function returning a boolean.

## Value

Returns the trajectory object.