@Override
		protected VtState handleNext(byte b, VtParser parser, VtHandler handler) {
			switch (b) {
				case '>':
					handler.handleSetCharset(parser.csG, VtCharset.GREEK);
					return CHAR;
				case '4':
					handler.handleSetCharset(parser.csG, VtCharset.DEC_HEBREW);
					return CHAR;
				case '?':
					handler.handleSetCharset(parser.csG, VtCharset.DEC_GREEK);
					return CHAR;
			}
			handler.handleCharExc((byte) 0x1b);
			return parser.doProcessByte(
				parser.doProcessByte(parser.doProcessByte(CHAR, parser.csG.b), (byte) '"'), b);
		}
We're selecting a two-byte charset, and we just encountered {@code "}.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/terminal/vt/VtState.java