class Aws::Query::ParamBuilder

def format(shape, value, prefix)
  case shape.type
  when 'structure' then structure(shape, value, prefix + '.')
  when 'list'      then list(shape, value, prefix)
  when 'map'       then map(shape, value, prefix)
  when 'blob'      then set(prefix, Base64.strict_encode64(value))
  when 'timestamp'
    set(prefix, shape.format_time(value, 'iso8601').to_s)
  else
    set(prefix, value.to_s)
  end
end