code: function getValidRelayQLTag(path: any): [any, ?string, ?string] {
    const {node} = path;
  
    const tag = path.get('tag');
    const tagName = tag.matchesPattern('Relay.QL')
      ? 'Relay.QL'
      : tag.matchesPattern('RelayClassic_DEPRECATED.QL')
      ? 'RelayClassic_DEPRECATED.QL'
      : tag.matchesPattern('RelayClassic.QL')
      ? 'RelayClassic.QL'
      : tag.isIdentifier({name: 'RelayQL'})
      ? 'RelayQL'
      : null;
    if (!tagName) {
      return [null, null, null];
    }
  
    let p = path;
    let propName = null;
    while (!propName && (p = p.parentPath)) {
      if (p.isProperty()) {
        propName = p.node.key.name;
      }
    }
  
    return [node.quasi, tagName, propName];
  }
docs: Given a TemplateLiteral path, return the metadata about a RelayQL tag
  if one exists.