The contents of @datanames or teal_data object with updated @datanames.
Arguments
x
(teal_data) object to access or modify
value
(character) new value for @datanames; all elements must be names of variables existing in @env
Details
The @datanames slot in a teal_data object specifies which of the variables stored in its environment
(the @env slot) are data sets to be taken into consideration.
The contents of @datanames can be specified upon creation and default to all variables in @env.
Variables created later, which may well be data sets, are not automatically considered such.
Use this function to update the slot.