module Grape::Validations

def build_short_name(klass)
  return if klass.name.blank?
  klass.name.demodulize.underscore.delete_suffix('_validator')
end

def require_validator(short_name)
  raise Grape::Exceptions::UnknownValidator, short_name unless registry.key?(short_name)
  registry[short_name]
end