Function uniffi_bindgen::macro_metadata::add_to_ci

pub fn add_to_ci(
    iface: &mut ComponentInterface,
    metadata_items: Vec<Metadata>
) -> Result<()>

Add Metadata items to the ComponentInterface

This function exists to support the transition period where the uniffi::export macro can only handle some components. This means that crates need to continue using UDL files to define the parts of the components that aren’t supported yet.

To make things work, we generate a ComponentInterface from the UDL file, then combine it with the Metadata items that the macro creates.