SyntheticDiD docs/examples use zeta_omega/zeta_lambda, but diff-diff==2.3.0 constructor only accepts lambda_reg/zeta

[Toruk-Machto]

Hi,

I’m on diff-diff==2.3.0 and hit this error when following SyntheticDiD docs/tutorial examples:

TypeError: SyntheticDiD.init() got an unexpected keyword argument 'zeta_omega'

In my environment, SyntheticDiD.init uses old args (lambda_reg, zeta) instead of zeta_omega/zeta_lambda.

Could you clarify and align docs/version behavior?
Suggested options:

1. Update docs/examples for 2.3.0 to use lambda_reg/zeta, or
2. Add backward-compatible aliases for zeta_omega/zeta_lambda, or
3. Add a clear version warning in docs for this API change.