dartR functions have a verbosity parameter that sets the level of reporting during the execution of the function. The verbosity level,
set by parameter 'verbose' can be one of verbose 0, silent or fatal errors; 1, begin and end; 2, progress log ; 3, progress and results summary;
5, full report. The default value for verbosity is stored as a flag in the gl@loc.metrics.flags slot of each genelight object. This script
sets the value of the flag.