Must traps errors and return the remaining results to the caller If there is an error, a panic is issued.

Print print error to the stderr in red.

Printf print a message to the stderr in red.

Raise issues a panic with a formated message representing a managed error.

Trap catch any panic exception, and convert it to error It must be called with current error state and recover() as argument.

TemplateNotFoundError is returned when a template does not exist.

Array represent an array of error.

Managed indicates an error that is properly handled (no need to print out stack).