Trait ContextAlpha
nvim_gtk::render
trait ContextAlpha { fn set_source_rgbo(&self, _: &Color, _: Option<f64>); }
fn set_source_rgbo(&self, _: &Color, _: Option<f64>)
impl ContextAlpha for Context
fn set_source_rgbo(&self, color: &Color, alpha: Option<f64>)