An abstract printer operation
This is a Business Operation class.
List of properties can be set as settings in the configuration file format is a comma separated list of property names
Character set to use when printing (UTF-8 is the default)
This value must either be lp or specified in the permitted interoperability OS command list.
Printer options, separated by a linefeed
This user callback method is called via initConfig() from %OnNew() or in the case of SOAP Services from OnPreSOAP()
Print a print job
Constructs the lp command for this print job
Submit the print job using the specified command