Function fetch_inline_module_script 

pub(crate) fn fetch_inline_module_script(
    cx: &mut JSContext,
    global: &GlobalScope,
    module_script_text: Rc<DOMString>,
    url: ServoUrl,
    options: ScriptFetchOptions,
    line_number: u32,
    introduction_type: Option<&'static CStr>,
    on_complete: impl FnOnce(&mut JSContext, Option<Rc<ModuleTree>>) + Clone + 'static,
)

https://html.spec.whatwg.org/multipage/#fetch-an-inline-module-script-graph