old_contents: import R from 'ramda';
  import spaceCase from './space-case.js';
  import uncapitalize from './uncapitalize.js';
  
  // a -> a
  const snakeCase = R.compose(
    uncapitalize,
    R.join('_'),
    R.split(' '),
    spaceCase
  );
  
  export default snakeCase;
  
new_contents: import R from 'ramda';
  import compose from './util/compose.js';
  import spaceCase from './space-case.js';
  import uncapitalize from './uncapitalize.js';
  
  // a -> a
  const snakeCase = compose(
    uncapitalize,
    R.join('_'),
    R.split(' '),
    spaceCase
  );
  
  export default snakeCase;
  
subject: Refactor snakeCase function to use custom compose function