How do I pass a custom prop into my custom tooltip component?

Given this working code, with a component like this:

interface CopilotTooltipProps {
  screen: string;
  isFirstStep: boolean;
  isLastStep: boolean;
  currentStep: any;
  handleNext(): void;
  handlePrev(): void;
  handleStop(): void;
}

const CopilotTooltip: React.SFC<CopilotTooltipProps> = (props) => {
  const { screen, isFirstStep, isLastStep, currentStep, handleNext, handlePrev, handleStop } = props;
  console.log('screen is', screen);
  return <View>
  <View style={styles.tooltipContainer}>
    <Text testID="stepDescription" style={styles.tooltipText}>{currentStep.text}</Text>
  </View>
  <View style={[styles.bottomBar]}>
    {
      !isLastStep ?
        <TouchableOpacity onPress={handleStop}>
          <View style={[styles.button]}>
            <Text style={[styles.buttonText]}>Skip</Text>
          </View>
        </TouchableOpacity>
        : null
    }
    {
      !isFirstStep ?
        <TouchableOpacity onPress={handlePrev}>
          <View style={[styles.button]}>
            <Text style={[styles.buttonText]}>Previous</Text>
          </View>
        </TouchableOpacity>
        : null
    }
    {
      !isLastStep ?
        <TouchableOpacity onPress={handleNext}>
          <View style={[styles.button]}>
            <Text style={[styles.buttonText]}>Next</Text>
          </View>
        </TouchableOpacity> :
        <TouchableOpacity onPress={handleStop}>
          <View style={[styles.button]}>
            <Text style={[styles.buttonText]}>Finish</Text>
          </View>
        </TouchableOpacity>
    }
  </View>
</View>;
};

used in a screen like so:

export default copilot({
  tooltipComponent: CopilotTooltip
})(Home);

how do I pass in the variable screen, while making sure all the other props have the same behaviour as when it's defined as above in my Home screen?

Start with the CopilotTooltipProps interface and the copilot({ tooltipComponent: CopilotTooltip })(Home) entry point shown in the issue. Trace how tooltipComponent receives its props and determine how a screen value could be documented alongside the existing injected props. Done means the supported usage and prop behavior are clearly explained.