RegexOption 
    Provides enumeration values to use to set regular expression options.
Since Kotlin
1.0Entries
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                  Enables case-insensitive matching. Case comparison is Unicode-aware.
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                  Enables Unix lines mode. In this mode, only the '\n' is recognized as a line terminator.
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                  Enables the mode, when the expression . matches any character, including a line terminator.
Functions
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                  Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
Since Kotlin 1.0
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                  Returns an array containing the constants of this enum type, in the order they're declared.
Since Kotlin 1.0