def __init__(self, payload):
    self.quadratic_fish_mortality_coeffs = np.array(payload['quadratic_fish_mortality_coeffs'])
    self.effect_delay: int = payload['effect_delay']
    self.application_period: int = payload['application_period']
def __init__(self, payload):
    self.quadratic_fish_mortality_coeffs = np.array(payload['quadratic_fish_mortality_coeffs'])
    self.effect_delay: int = payload['effect_delay']
    self.application_period: int = payload['application_period']