SOURCE_FILE@0..20
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    IMPL_KW@0..4 "impl"
    WHITESPACE@4..5 " "
    BANG@5..6 "!"
    PATH_TYPE@6..10
      PATH@6..10
        PATH_SEGMENT@6..10
          NAME_REF@6..10
            IDENT@6..10 "Send"
    WHITESPACE@10..11 " "
    FOR_KW@11..14 "for"
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    PATH_TYPE@15..16
      PATH@15..16
        PATH_SEGMENT@15..16
          NAME_REF@15..16
            IDENT@15..16 "X"
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    ASSOC_ITEM_LIST@17..19
      L_CURLY@17..18 "{"
      R_CURLY@18..19 "}"
  WHITESPACE@19..20 "\n"