difftastic/vendored_parsers/tree-sitter-hack/test/cases/expressions/namespace-keyword.exp

(script
  (function_declaration
    name: (identifier)
    (parameters
      (parameter
        type: (type_specifier
          (qualified_identifier
            (identifier)
            (identifier)))
        name: (variable)))
    return_type: (type_specifier
      (qualified_identifier
        (identifier)
        (identifier)))
    body: (compound_statement))
  (function_declaration
    name: (identifier)
    (parameters
      (parameter
        type: (type_specifier
          (qualified_identifier
            (identifier)
            (identifier)
            (identifier)))
        name: (variable)))
    return_type: (type_specifier
      (qualified_identifier
        (identifier)
        (identifier)
        (identifier)))
    body: (compound_statement))
  (expression_statement
    (call_expression
      function: (qualified_identifier
        (identifier)
        (identifier))
      (arguments)))
  (expression_statement
    (call_expression
      function: (qualified_identifier
        (identifier)
        (identifier)
        (identifier))
      (arguments))))