You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: mod.rs
    path of file: ./repos/hash/apps/hash-graph/libs/graph/src/store/postgres/ontology
    
    the code of the file until where you have to start completion: mod data_type;
mod entity_type;
mod ontology_id;
mod property_type;
mod read;

use std::{borrow::Cow, convert::identity}
    
            fn decode(row: &Row, indices: &Self::CompilationArtifacts) -> Self::Output {
                Self::Output {
                    base_id: BaseUrl::new(row.get(indices.base_url))
                        .expect("invalid base URL returned from Postgres"),
                    revision_id: row.get(indices.version),
                }
            }