docs: def _drop(self, table, existing_tables=None):
          """Private method for executing table drop commands."""
          # Retrieve list of existing tables for comparison
          existing_tables = existing_tables if existing_tables else self.tables
  
          # Only drop table if it exists
          if table in existing_tables:
              # Set to avoid foreign key errorrs
              self.execute('SET FOREIGN_KEY_CHECKS = 0')
  
              query = 'DROP TABLE {0}'.format(wrap(table))
              self.execute(query)
  
              # Set again
              self.execute('SET FOREIGN_KEY_CHECKS = 1')
              self._printer('\tDropped table {0}'.format(table))