Integrates an area of interest within a specific spectrum named spectrum-name the area-of-interest can either be spectrum coordinates or a displayable gate.
The command is wrapped in a CMPITclCommand.
This command is only executed in the MPI_EVENT_SINK_RANK process,
as it is the only one with access to spectrum channel values as well as definitions.
In all other processes, a status of TCL_OK is returned and
an empty result is produced.