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    Class BeforeDropdownOpenEventArgs

    Fired before dropdown opens - can be canceled

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    Cancel CancelReason? Timestamp Tree

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    Cancel: boolean = false

    Set to true to cancel the operation

    CancelReason?: string

    Optional reason for cancellation (for logging/debugging)

    Timestamp: Date

    Timestamp when event was raised

    Tree: unknown

    The tree component that raised the event

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