@Deprecated
    public void setBatch(boolean batch) {
    }
Removes from the underlying collection the last element returned by the
iterator (optional operation).  This method can be called only once per
call to <tt>next</tt>.  The behavior of an iterator is unspecified if
the underlying collection is modified while the iteration is in
progress in any way other than by calling this method.

@throws UnsupportedOperationException if the <tt>remove</tt>
                                      operation is not supported by this Iterator.
@throws IllegalStateException         if the <tt>next</tt> method has not
                                      yet been called, or the <tt>remove</tt> method has already
                                      been called after the last call to the <tt>next</tt>
                                      method.
modules/siddhi-core/src/main/java/io/siddhi/core/event/ComplexEventChunk.java