def __init__(self, name=None, identifier=None, labels=None, command=None,<EOL>creation_timestamp=None, env_variables=None):
self.name = name<EOL>self.identifier = identifier<EOL>self.labels = labels<EOL>self.command = command<EOL>self.creation_timestamp = creation_timestamp<EOL>self.env_variables = env_variables or {}<EOL>
:param name: str, name of object
:param identifier: str, id of object
:param labels: dict, {key: value}
:param command: list of str, command to run in the container, example:
    - ["psql", "--version"]
    - ["python3", "-m", "http.server", "--bind", "0.0.0.0", "8080"]
:param creation_timestamp: str, creation time of object instance
:param env_variables: dict, {name: value}