public String escapeColName(String colName) {
        return colName;
    }
When using a column name in a generated SQL query, how (if at all)
should we escape that column name? e.g., a column named "table"
may need to be quoted with backtiks: "`table`".

@param colName the column name as provided by the user, etc.
@return how the column name should be rendered in the sql text.
src/main/java/org/replicadb/manager/ConnManager.java