above_threshold_observer = {above_threshold_observer_impl}

ia_decision_observer = {ia_decision_observer_impl}

mrom_no_observer = {mrom_no_observer_impl}

mrom_yes_observer = {mrom_yes_observer_impl}

output_above_threshold_observer = {output_above_threshold_observer_impl}

output_string_observer = {output_string_observer_impl}

regex_observer = {regex_observer_impl}

selective_observer = {selective_observer_impl}

serialize_blocks_observer = {serialize_blocks_observer_impl}

spatial_verbose_observer = {spatial_verbose_observer_impl}

time_observer = {time_observer_impl}

top_n_observer = {top_n_observer_impl}

verbose_observer = {verbose_observer_impl}