iterate over existing fields

list existing fields

get existing values

get random existing field (and value)

test existence of a field

get the number of existing fields

delete a field

get the value of a field

set the value of a field

... if target does not exist

get all fields and values

get multiple fields

set multiple fields

get the length of a field value

interpret field as integer and increment or decrement

interpret field as float and increment or decrement