test.java.file
  LAMBDA_EXPRESSION
    PARAMETER_LIST
      LPARENTH
      PARAMETER
        MODIFIER_LIST
          <empty list>
        IDENTIFIER
      COMMA
      WHITE_SPACE
      PARAMETER
        MODIFIER_LIST
          <empty list>
        IDENTIFIER
      COMMA
      ERROR_ELEMENT
        <empty list>
    WHITE_SPACE
    ARROW
    WHITE_SPACE
    LITERAL_EXPRESSION
      NULL_KEYWORD