Use keyof

[MixusMinimax]

Existing Code

export interface SelectProps<ValueType = any, OptionType extends BaseOptionType = DefaultOptionType> extends BaseSelectPropsWithoutPrivate {
    //...
    optionFilterProp?: string;
}

Proposed Code

export interface SelectProps<ValueType = any, OptionType extends BaseOptionType = DefaultOptionType> extends BaseSelectPropsWithoutPrivate {
    //...
    optionFilterProp?: keyof OptionType;
}

This will give use better autocomplete.