code: function reportIfUnreachable(node) {
              let nextNode = null;
  
              if (node && currentCodePath.currentSegments.every(isUnreachable)) {
  
                  // Store this statement to distinguish consecutive statements.
                  if (range.isEmpty) {
                      range.reset(node);
                      return;
                  }
  
                  // Skip if this statement is inside of the current range.
                  if (range.contains(node)) {
                      return;
                  }
  
                  // Merge if this statement is consecutive to the current range.
                  if (range.isConsecutive(node)) {
                      range.merge(node);
                      return;
                  }
  
                  nextNode = node;
              }
  
              /*
               * Report the current range since this statement is reachable or is
               * not consecutive to the current range.
               */
              if (!range.isEmpty) {
                  context.report({
                      message: "Unreachable code.",
                      loc: range.location,
                      node: range.startNode
                  });
              }
  
              // Update the current range.
              range.reset(nextNode);
          }
docs: Reports a given node if it's unreachable.
  @param {ASTNode} node - A statement node to report.
  @returns {void}