"""
This type stub file was generated by pyright.
"""

from abc import ABCMeta, abstractmethod

class BaseTrigger(metaclass=ABCMeta):
    """Abstract base class that defines the interface that every trigger must implement."""
    __slots__ = ...
    @abstractmethod
    def get_next_fire_time(self, previous_fire_time, now): # -> None:
        """
        Returns the next datetime to fire on, If no such datetime can be calculated, returns
        ``None``.

        :param datetime.datetime previous_fire_time: the previous time the trigger was fired
        :param datetime.datetime now: current datetime
        """
        ...