code: function getThemeProps(params) {
    const { theme, name, props } = params;
  
    if (!theme || !theme.props || !theme.props[name]) {
      return props;
    }
  
    // Resolve default props, code borrow from React source.
    // https://github.com/facebook/react/blob/15a8f031838a553e41c0b66eb1bcf1da8448104d/packages/react/src/ReactElement.js#L221
    const defaultProps = theme.props[name];
    let propName;
  
    for (propName in defaultProps) {
      if (props[propName] === undefined) {
        props[propName] = defaultProps[propName];
      }
    }
  
    return props;
  }
docs: /* eslint-disable no-restricted-syntax