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has_symbol

js_sys::Reflect

Function has_symbol 

Source 
pub fn has_symbol<T>(
    target: &Object<T>,
    property_key: &Symbol,
) -> Result<bool, JsValue>
where
    Object<T>: ErasableGenericBorrow<Object<JsValue>>,
Expand description

The static Reflect.has() method works like the in operator as a function.

MDN documentation