Ann: An Annotation object. (CDM_Annotation) start: The start byte offset of the Span to be deleted. (long) end: The end byte offset of the Span to be deleted. (long)
This function will remove the Span having as start and end offsets
the values specified through the "start" and "end" parameters
from the specified Annotation, if such a Span object exists.
The returned value of this function will always be a new Annotation
object if a proper Span object was found and removed.
If a Span object with the
proper start and end offsets was not found, the empty string will be
returned.
Return Value:
This function returns a new Annotation object (of type CDM_Annotation) if
a Span object with the same offsets as the provided ones is found and
removed from the provided Annotation.
In the case that a proper Span object is not found, the empty string ({})
is returned.