vrnode/isfield
(To be removed) Returns true if field is name of vrnode object
        field
Since R2023a
vrnode/isfield will be removed in a future release. For more
        information, see Version History.
Syntax
x = isfield(vrnode_object,fieldnames)
Arguments
| 
 | Name of a  | 
| fieldnames | String array or cell array of character vectors. | 
Description
x = isfield(vrnode_object,fieldnames) returns a logical array,
          x, the same size as that of fieldnames.
          x contains true for the elements of fieldnames that
        are the names of fields in the vrnode and false otherwise.