code: public TerminalResult BR_OPEN() {
  		ConcatenateExpression ce = new ConcatenateExpression(Concatenator.BR_OPEN);
  		this.astObjectsContainer.addAstObject(ce);
  		TerminalResult ret = APIAccess.createTerminalResult(ce);
  		QueryRecorder.recordInvocation(this, "BR_OPEN", ret);
  		return ret;
  	}
docs: Open a block, encapsulating predicate expressions