public String toFormulaString(String[] operands) {StringBuilder buf = new StringBuilder();if(isExternalFunction()) {buf.append(operands[0]); appendArgs(buf, 1, operands);} else {buf.append(getName());appendArgs(buf, 0, operands);}return buf.toString();}
public override String ToFormulaString(String[] operands){StringBuilder buf = new StringBuilder();if (IsExternalFunction){buf.Append(operands[0]); AppendArgs(buf, 1, operands);}else{buf.Append(Name);AppendArgs(buf, 0, operands);}return buf.ToString();}