helpText
auto helpText = 
q"EOS
Synopsis: tsv-summarize [options] file [file...]
tsv-summarize runs aggregation operations on fields in tab-separated value
files. Operations can be run against the full input data or grouped by key
fields. Use --help-verbose for more extensive help.
Options:
EOS";
  
		tsv_summarize 
		classesfunctionsinterfacesstructsvariables