No overload matches this call. Overload 1 of 2, '(...items: ConcatArray<{ text: string; value: string; }>[]): { text: string; value: string; }[]', gave the following error. Argument of type 'string[]' is not assignable to parameter of type 'ConcatArray<{ text: string; value: string; }>'. The types returned by 'slice(...)' are incompatible between these types. Type 'string[]' is not assignable to type '{ text: string; value: string; }[]'. Type 'string' is not assignable to type '{ text: string; value: string; }'. Overload 2 of 2, '(...items: ({ text: string; value: string; } | ConcatArray<{ text: string; value: string; }>)[]): { text: string; value: string; }[]', gave the following error. Argument of type 'string[]' is not assignable to parameter of type '{ text: string; value: string; } | ConcatArray<{ text: string; value: string; }>'. Type 'string[]' is not assignable to type 'ConcatArray<{ text: string; value: string; }>'. The types returned by 'slice(...)' are incompatible between these types. Type 'string[]' is not assignable to type '{ text: string; value: string; }[]'. Type 'string' is not assignable to type '{ text: string; value: string; }'.