Function write_as 

pub fn write_as(
    net: &Network,
    format: TargetFormat,
) -> Result<Conversion, Error>

Convert a Network to format. Writing back to the source format returns the retained source text; otherwise the network is serialized into the target.

Errors

Only a PowerioJson serialization failure (none arise from this model today). A non-finite value is not an error: readers legitimately produce Inf limits and the bindings materialize every network through the snapshot, so it is written as null with a fidelity warning naming the field: that output serves the one-way transports but does not read back (the validating reader rejects the null).