Adds extra code to a registered script.
Code will only be added if the script is already in the queue. Accepts a string $data containing the Code. If two or more code blocks are added to the same script $handle, they will be printed in the order they were added, i.e. the latter added code can redeclare the previous.
(string) (Required) Name of the script to add the inline script to.
(string) (Optional) Whether to add the inline script before the handle or after.
Default value: 'after'
(bool) True on success, false on failure.