function processToken(token, tokenType, column, newColumn)
        {
            if (!tokenType)
                return;

            if (column > plainTextStart) {
                var plainText = line.substring(plainTextStart, column);
                node.createTextChild(plainText);
            }
            node.appendChild(this.createSpan(token, tokenType));
            plainTextStart = newColumn;
        }
@param {string} token
@param {?string} tokenType
@param {number} column
@param {number} newColumn
@this {WebInspector.DOMSyntaxHighlighter}