Return the documentation comment for this element as it appears in the
original source (complete with the beginning and ending delimiters), or
null if this element does not have a documentation comment associated
with it. This can be a long-running operation if the information needed to
access the comment is not cached.
Throws AnalysisException if the documentation comment could not be determined because the analysis could not be performed
Deprecated. Use documentationComment instead.
@deprecated String computeDocumentationComment();