Function load_custom_icon 

pub fn load_custom_icon(
    provider: &(impl IconProvider + ?Sized),
    set: IconSet,
) -> Option<IconData>

Load an icon from any IconProvider, dispatching through the standard platform loading chain.

Fallback chain

1. Provider’s icon_name() – passed to platform system loader via load_system_icon_by_name()
2. Provider’s icon_svg() – bundled SVG data
3. None – no cross-set fallback (mixing icon sets is forbidden)

Examples

use native_theme::{load_custom_icon, IconRole, IconSet};

// IconRole implements IconProvider, so it works with load_custom_icon
let icon = load_custom_icon(&IconRole::ActionCopy, IconSet::Material);
assert!(icon.is_some());