How to use the @synerise/ds-typography.macro.medium function in @synerise/ds-typography

import styled from 'styled-components';
import { macro } from '@synerise/ds-typography';

export const Header = styled.div`
  background: #ffffff;
  padding: 24px;
  display: flex;
  justify-content: space-between;
`;

export const SelectionHeader = styled(Header)`
  background: ${(props): string => props.theme.palette['blue-600']};
`;

export const Size = styled.div`
  ${macro.medium};
  color: #fff;
  b {
    ${macro.h400};
    color: inherit;
  }
`;

export const Title = styled.div`
  ${macro.h400};
`;

export const SubTitle = styled.div`
  ${macro.small};
  border-left: 1px solid ${(props): string => props.theme.palette['grey-200']};
  color: ${(props): string => props.theme.palette['grey-800']};
  margin-left: 24px;

min-height: 80px;
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  align-content: center;
`;

export const PageHeaderContent = styled.div`
  > * {
    margin-left: 12px;
  }
`;

export const BackButton = styled.button`
  ${macro.medium};
  display: flex;
  align-items: center;
  background: transparent;
  border: none;
  color: ${(props): string => props.theme.palette['grey-500']};
  margin-left: 16px;
  border-left: 1px solid ${(props): string => props.theme.palette['grey-300']};
  cursor: pointer;

  &:hover {
    color: ${(props): string => props.theme.palette['grey-600']};
  }
`;

export const PageHeaderTitle = styled.div`
  ${macro.h700};