pub fn style_for_element(
author: &StyleSet,
document: &Document,
node: NodeId,
parent_style: Option<&ComputedValues>,
) -> Arc<ComputedValues>
pub fn style_for_element(
author: &StyleSet,
document: &Document,
node: NodeId,
parent_style: Option<&ComputedValues>,
) -> Arc<ComputedValues>