Function build_redacted_because 

fn build_redacted_because(
    redactor: &UserId,
    reason: Option<String>,
    timestamp: MilliSecondsSinceUnixEpoch,
) -> RedactedBecause

Build a RedactedBecause object for event redaction.

Creates the redaction event metadata to be attached to the unsigned.redacted_because field of redacted events.

Read: https://spec.matrix.org/v1.17/client-server-api/#redactions

Parameters

• redactor: User ID performing the redaction.
• reason: Optional reason for the redaction.
• timestamp: Timestamp for the redaction event.

Returns

A RedactedBecause instance representing the redaction event.