Function expand_split_packages 

pub fn expand_split_packages(
    package_names: &[String],
    action: &str,
) -> Result<Vec<String>>

Expands split packages into their individual sub-packages if they are installed.

Errors

Returns an error if:

• The list of installed packages cannot be retrieved.
• A package name cannot be parsed.
• A package cannot be resolved to a specific version.