3.28  drscheme:unit:frame<%>

Methods
    ensure-defs-shown
    ensure-rep-hidden
    ensure-rep-shown
    get-current-tab
    get-definitions-canvas
    get-definitions-text
    get-interactions-canvas
    get-interactions-text
    get-special-menu
    on-tab-change (augmentable only)
    register-capability-menu-item