///|
pub extend Observation with @debug.Debug::{to_repr}

///|
pub extend Observation with Eq::{equal, not_equal}

///|
pub extend Measurement with @debug.Debug::{to_repr}

///|
pub extend Measurement with Eq::{equal, not_equal}

///|
pub extend Visit with @debug.Debug::{to_repr}

///|
pub extend Visit with Eq::{equal, not_equal}