Function as_model_error 

pub fn as_model_error<E>(
    error_type: ModelErrorType,
    message: impl Into<String>,
) -> impl FnOnce(E) -> ModelError
where
    E: Into<Error>,

Helper function for .map_err() chains to wrap any error as ModelError.

This function creates a closure that converts any error into a ModelError with the specified error type and message, including the original error as the source.

Examples

// Instead of:
.map_err(|e| ModelError::new(ModelErrorType::Generic, e.to_string(), Some(e.into())))?

// You can write:
.map_err(as_model_error(ModelErrorType::Generic, "Failed to process".to_string()))?