Mod JLine::getMethod to rely on JLine::isMethod

Under original implementation, getMethod was performing its own check to
determine if 'this' contained a method declaration.  However, a method
(JLine::isMethod() ) had already been written with this purpose.  This
duplication of logic was poor practice and was removed in this commit by
replacing the native logic with a call to JLine::isMethod().
Mod JLine::getInclude to rely on JLine::isInclude

The JLine::getInclude method was executing logic to ensure that the
text encapsulated by the JLine obj contained an import/include stmt.
However, a method (JLine::isInclude() ) had already been written for
this purpose.  To avoid this duplication of logic, the duplicitous
code in JLine::getInclude was replaced with a call to JLine::isInclude