private function createEnvironment()
{
$table = $this->createTable('environment');
$table->addColumn('id', 'integer', ['autoincrement' => true]);
$table->addColumn('run_id', 'integer');
$table->addColumn('provider', 'string');
$table->addColumn('ekey', 'string');
$table->addColumn('value', 'string');
$table->addForeignKeyConstraint($this->runTable, ['run_id'], ['id'], ['onDelete' => 'CASCADE']);
$table->setPrimaryKey(['id']);
}