code: function getTopConcatBinaryExpression(node) {
      let currentNode = node;
  
      while (isConcatenation(currentNode.parent)) {
          currentNode = currentNode.parent;
      }
      return currentNode;
  }
docs: Gets the top binary expression node for concatenation in parents of a given node.
  @param {ASTNode} node - A node to get.
  @returns {ASTNode} the top binary expression node in parents of a given node.