Defining a function that takes specific parameters

I have a computed getter function I created that essentially checked if a scroll bar exists and if it does, a component is moved to adjust for the scroll bar. Here is the code:

  get scrollTrackOffset() {
    const rowCount = this.yKeys.length || 0;
    const totalRowHeight = rowCount * this.rowHeight;
    return totalRowHeight > this.height ? 15 : 0;
  }

The 'yKeys' for reference is a separate computed getter that always returns an array which will determine if a scroll bar exists or not. My question is that is there a way for me to make

const rowCount = this.yKeys.length || 0;
const totalRowHeight = rowCount * this.rowHeight;
return totalRowHeight > this.height ? 15 : 0;

into a reuse-able function where I can input the parameters such as this.height and this.yKeys?

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