test.java.file
  LAMBDA_EXPRESSION
    PARAMETER_LIST
      LPARENTH
      PARAMETER
        MODIFIER_LIST
          FINAL_KEYWORD
        WHITE_SPACE
        TYPE
          INT_KEYWORD
        WHITE_SPACE
        IDENTIFIER
      RPARENTH
    WHITE_SPACE
    ARROW
    WHITE_SPACE
    REFERENCE_EXPRESSION
      REFERENCE_PARAMETER_LIST
        <empty list>
      IDENTIFIER