Function minimum_lock_time_ms 

pub fn minimum_lock_time_ms(kind: MsmKind, indicator: u16) -> Option<u32>

Minimum continuous-lock time encoded by an MSM lock-time indicator.

MSM4 uses DF402, a 4-bit coarse bucket. MSM7 uses DF407, a 10-bit extended bucket. Returns None for indicators outside the field’s bit range and for DF407 reserved values 705 through 1023.