Function extension_module_schema_for_context 

pub fn extension_module_schema_for_context(
    module_name: &str,
    current_file: Option<&Path>,
    workspace_root: Option<&Path>,
    current_source: Option<&str>,
    cache: &ExtensionModuleSchemaCache,
) -> Option<ParsedModuleSchema>

Load one declared extension module schema by name for current context, consulting the provided cache.