class_docstr: This test exists because we removed the MySQL dialect's
  override of the UTC_TIMESTAMP() function, where the commit message
  for this feature stated that "it caused problems with executemany()".
  Since no example was provided, we are trying lots of combinations
  here.
  
  [ticket:3966]
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code: def define_tables(cls, metadata):
      Table(
          "t",
          metadata,
          Column("id", Integer, primary_key=True),
          Column("x", Integer),
          Column("data", DateTime),
      )
  
      Table(
          "t_default",
          metadata,
          Column("id", Integer, primary_key=True),
          Column("x", Integer),
          Column("idata", DateTime, default=func.utc_timestamp()),
          Column("udata", DateTime, onupdate=func.utc_timestamp()),
      )
  
imports: import datetime
  from sqlalchemy import bindparam
  from sqlalchemy import Column
  from sqlalchemy import DateTime
  from sqlalchemy import event
  from sqlalchemy import exc
  from sqlalchemy import func
  from sqlalchemy import Integer
  from sqlalchemy import MetaData
  from sqlalchemy import select
  from sqlalchemy import Table
  from sqlalchemy import testing
  from sqlalchemy.dialects import mysql
  from sqlalchemy.engine.url import make_url
  from sqlalchemy.testing import assert_raises_message
  from sqlalchemy.testing import engines
  from sqlalchemy.testing import eq_
  from sqlalchemy.testing import expect_warnings
  from sqlalchemy.testing import fixtures
  from sqlalchemy.testing import in_
  from sqlalchemy.testing import is_
  from sqlalchemy.testing import mock
  from sqlalchemy.testing.assertions import AssertsCompiledSQL
  from .test_compiler import ReservedWordFixture
label_desc: Use image node_id 1 for calling the RemoveUTCTimestampTest obj's underlying member method code with example usage: obj.define_tables(cls, metadata) without return types