difftastic/vendored_parsers/tree-sitter-hack/test/cases/expressions/function-call-selection.exp

(script
  (expression_statement
    (call_expression
      function: (selection_expression
        (variable)
        (variable))
      (arguments)))
  (expression_statement
    (call_expression
      function: (selection_expression
        (qualified_identifier
          (identifier))
        (qualified_identifier
          (identifier)))
      (arguments))))