difftastic/vendored_parsers/tree-sitter-hack/test/cases/expressions/enum-class-labels.exp

(script
  (expression_statement
    (enum_class_label
      (qualified_identifier
        (identifier))
      (identifier)))
  (expression_statement
    (call_expression
      (qualified_identifier
        (identifier))
      (arguments
        (argument
          (enum_class_label
            (identifier)))))))