# From 'btrfs --help':
    btrfs property get [-t <type>] <object> [<name>]
        Get a property value of a btrfs object
    btrfs property set [-t <type>] <object> <name> <value>
        Set a property on a btrfs object
    btrfs property list [-t <type>] <object>
        Lists available properties with their descriptions for the given object

# e.g (from StackExchange):
# '-ts' presumably means type subvolume.
    btrfs property list -ts sda10/snapshots/base_2021-06-02_14\:57_r/

# More generally:
    btrfs property list -ts /path/to/snapshot


# To 'get' the 'ro' property:
    btrfs property get -ts sda10/snapshots/base_2021-06-02_14\:57_r/ ro
    ro=true

# More generally:
    btrfs property get -ts /path/to/snapshot ro


# (from StackExchange) to change a snapshot from ro to rw:
    btrfs property set -ts /path/to/snapshot ro false