class Restforce::Mash

def klass(val)

represent the data.
When passed a hash, it will determine what class is appropriate to 
def klass(val)
  if val.key? 'records'
    # When the hash has a records key, it should be considered a collection
    # of sobject records.
    Restforce::Collection
  elsif val.key? 'attributes'
    case val.dig('attributes', 'type')
    when "Attachment"
      Restforce::Attachment
    when "Document"
      Restforce::Document
    else
      # When the hash contains an attributes key, it should be considered an
      # sobject record
      Restforce::SObject
    end
  else
    # Fallback to a standard Restforce::Mash for everything else
    Restforce::Mash
  end
end