class Toys::FlagGroup::AtLeastOne


A FlagGroup in which at least one flag must be set
#

def validation_errors(seen)

# @private 
def validation_errors(seen)
  flags.each do |flag|
    return [] if seen.include?(flag.key)
  end
  str = "At least one flag out of group #{summary} is required, but none were provided."
  [ArgParser::FlagGroupConstraintError.new(str)]
end