code: function processBreakpoints(root, breakpointsOption) {
    if (breakpointsOption && !Array.isArray(breakpointsOption)) {
      throw new Error('Breakpoints option must be of type Array.');
    }
  
    const defaultBreakpoints = [
      {
        prefix: 'xs-',
        mediaQuery: '(max-width: 40em)',
      },
      {
        prefix: 'sm-',
        mediaQuery: '(min-width: 40em)',
      },
      {
        prefix: 'md-',
        mediaQuery: '(min-width: 52em)',
      },
      {
        prefix: 'lg-',
        mediaQuery: '(min-width: 64em)',
      },
    ];
  
    const mergedBreakpoints = merge([], defaultBreakpoints, breakpointsOption);
    return mergedBreakpoints.map((breakpoint) => processBreakpoint(root, breakpoint));
  }
docs: Provides defaults for the breakpoints options and processes each one
  @param {Object} root Root postcss node
  @param {Array} breakpointsOption Array of breakpoint objects
  @return {Array} Processed breakpoints option