code: function checkExpression(node) {
              if (!node.delegate) {
                  return;
              }
  
              const tokens = sourceCode.getFirstTokens(node, 3);
              const yieldToken = tokens[0];
              const starToken = tokens[1];
              const nextToken = tokens[2];
  
              checkSpacing("before", yieldToken, starToken);
              checkSpacing("after", starToken, nextToken);
          }
docs: Enforces the spacing around the star if node is a yield* expression.
  @param {ASTNode} node A yield expression node.
  @returns {void}