utility method to validate the supplied qos value . concode_field_sep boolean retained concode_elem_sep boolean dup concode_elem_sep byte[] payload concode_elem_sep int qos concode_elem_sep boolean mutable concode_field_sep byte[] getPayload concode_elem_sep void clearPayload concode_elem_sep void setQos concode_elem_sep boolean isRetained concode_elem_sep void setPayload concode_elem_sep int getQos concode_elem_sep void setDuplicate concode_elem_sep void setMutable concode_elem_sep String toString concode_elem_sep boolean isDuplicate concode_elem_sep void setRetained concode_elem_sep void checkMutable
void function ( int arg0 ) { if ( ( arg0 < 0 ) || ( arg0 > 2 ) ) { throw new IllegalArgumentException ( ) ; } }