class ActiveRecord::ConnectionAdapters::Table

def timestamps(**options)

See {connection.add_timestamps}[rdoc-ref:SchemaStatements#add_timestamps]

t.timestamps(null: false)

Adds timestamps (+created_at+ and +updated_at+) columns to the table.
def timestamps(**options)
  raise_on_if_exist_options(options)
  @base.add_timestamps(name, **options)
end