def _write_class_header(self) -> None:
    '\n        Generate a class header for stored routine wrapper.\n        '
    self._write_line('from typing import Any, Dict, List, Optional, Union')
    self._write_line()
    self._write_line('from {0!s} import {1!s}'.format(self._parent_class_namespace, self._parent_class_name))
    self._write_line()
    self._write_line()
    self._write_line('class {0!s}({1!s}):'.format(self._wrapper_class_name, self._parent_class_name))
    self._write_line('    """')
    self._write_line('    The stored routines wrappers.')
    self._write_line('    """')
Generate a class header for stored routine wrapper.
def _write_class_header(self) -> None:
    '\n        \n        '
    self._write_line('from typing import Any, Dict, List, Optional, Union')
    self._write_line()
    self._write_line('from {0!s} import {1!s}'.format(self._parent_class_namespace, self._parent_class_name))
    self._write_line()
    self._write_line()
    self._write_line('class {0!s}({1!s}):'.format(self._wrapper_class_name, self._parent_class_name))
    self._write_line('    "')
    self._write_line('    The stored routines wrappers.')
    self._write_line('    "')