code: function isMember(node, name) {
      return (
          node.type === "MemberExpression" &&
          (node.computed ? isConstant : isIdentifier)(node.property, name)
      );
  }
docs: Checks a given node is a MemberExpression node which has the specified name's
  property.
  
  @param {ASTNode} node - A node to check.
  @param {string} name - A name to check.
  @returns {boolean} `true` if the node is a MemberExpression node which has
  the specified name's property