This function, row_names_in_catgeory, returns an array of row names which belong to the same row category. This is useful for use in content functions like tables and bar graphs.
category (string): Specifies the category name to search for
Basic format: ["row_names_in_category", "category"]
In the following example, we want to return an array of player names:
e.g: ["row_names_in_category", "player"]