code: func LoadPKCS11ContextHandle(lib, label, pin string, opts ...Options) (*ContextHandle, error) {
  	return getInstance(&pkcs11CtxCacheKey{lib: lib, label: label, pin: pin, opts: getCtxOpts(opts...)}, false)
  }
docs: //LoadPKCS11ContextHandle loads PKCS11 context handler instance from underlying cache