Struct RenderTooltipTextureEvent 

pub struct RenderTooltipTextureEvent<'a> {
    pub stack: Option<&'a ItemStack>,
    pub texture: &'a mut Option<Identifier>,
    pub background: u32,
    pub border_top: u32,
    pub border_bottom: u32,
}

What Hooks::render_tooltip_texture is told. Each field is that hook’s argument of the same name, described in the hook’s doc.

Fields

stack: Option<&'a ItemStack>

texture: &'a mut Option<Identifier>

background: u32

border_top: u32

border_bottom: u32