Function JSValueIsInstanceOfConstructor 

pub unsafe extern "C-unwind" fn JSValueIsInstanceOfConstructor(
    ctx: JSContextRef,
    value: JSValueRef,
    constructor: JSObjectRef,
    exception: *mut JSValueRef,
) -> bool

👎Deprecated:

renamed to JSValue::is_instance_of_constructor

Available on crate features JSBase and JSValueRef only.