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    "is_mime",
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    "is_url",
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      "page": "assert_empty_dots",
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      "page": "is_base64",
      "title": "Check if an argument is a base64 string",
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    {
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      "title": "Check if an argument is base64url string",
      "topics": [
        "is_base64url"
      ]
    },
    {
      "page": "is_bic",
      "title": "Check if an argument is a BIC/SWIFT code string",
      "topics": [
        "is_bic"
      ]
    },
    {
      "page": "is_color_hex",
      "title": "Check if an argument is a hex color string",
      "topics": [
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      ]
    },
    {
      "page": "is_cuid2",
      "title": "Check if an argument is a CUID2 string",
      "topics": [
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      ]
    },
    {
      "page": "is_cusip",
      "title": "Check if an argument is a valid CUSIP string",
      "topics": [
        "is_cusip"
      ]
    },
    {
      "page": "is_doi",
      "title": "Check if an argument is a DOI string",
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      ]
    },
    {
      "page": "is_email",
      "title": "Check if an argument is a email address string",
      "topics": [
        "is_email"
      ]
    },
    {
      "page": "is_figi",
      "title": "Check if an argument is a valid FIGI string",
      "topics": [
        "is_figi"
      ]
    },
    {
      "page": "is_hex",
      "title": "Check if an argument is a hexadecimal string",
      "topics": [
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    },
    {
      "page": "is_hostname",
      "title": "Check if an argument is a hostname string",
      "topics": [
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    },
    {
      "page": "is_iban",
      "title": "Check if an argument is a valid IBAN string",
      "topics": [
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    },
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      "page": "is_ipv4",
      "title": "Check if an argument is an IPv4 address string",
      "topics": [
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    },
    {
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      "title": "Check if an argument is an IPv6 address string",
      "topics": [
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    {
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      "title": "Check if an argument is an ISBN string",
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      ]
    },
    {
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      "topics": [
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