code: function checkVar(node) {
              const leftNode = (node.id.typeAnnotation) ? node.id.typeAnnotation : node.id;
              const rightNode = node.init;
  
              if (rightNode) {
                  const nonSpacedNode = getFirstNonSpacedToken(leftNode, rightNode, "=");
  
                  if (nonSpacedNode) {
                      report(node, nonSpacedNode);
                  }
              }
          }
docs: Check if the node is a variable
  @param {ASTNode} node node to evaluate
  @returns {void}
  @private