difftastic/vendored_parsers/tree-sitter-hack/test/cases/declarations/empty-function.exp

(script
  (namespace_declaration
    body: (compound_statement
      (function_declaration
        (attribute_modifier
          (qualified_identifier
            (identifier))
          (qualified_identifier
            (identifier)))
        name: (identifier)
        (parameters
          (parameter
            name: (variable)))
        return_type: (type_specifier))
      (function_declaration
        (attribute_modifier
          (qualified_identifier
            (identifier))
          (qualified_identifier
            (identifier)))
        name: (identifier)
        (parameters
          (parameter
            name: (variable)))
        return_type: (type_specifier)))))