code: function extendsNull(node) {
              return (
                  node.superClass != null &&
                  node.superClass.type === "Literal" &&
                  node.superClass.value === null
              )
          }
docs: Checks whether the given class extends from null or not.
  
  @param {ASTNode} node - The class node to check.
  @returns {boolean} `true` if the class extends from null.