Function stage_apply_checked 

pub fn stage_apply_checked(
    submission: BuilderSubmission,
    config: &mut Config,
    surface: Surface,
    staged_check: &(dyn Fn(&Config) -> Result<(), String> + Sync),
) -> Result<StagedQuickstartApply, Vec<QuickstartError>>

Compile the staged authorization policy before any persistent write.