Base::renderControlSingle: Bitrix method

      
<?php 
//  Bitrix\Bizproc\BaseType\Base :: renderControlSingle()
//  /dist/bitrix/modules/bizproc/lib/basetype/base.php:412

    public static function renderControlSingle(FieldType $fieldType, array $field, $value, $allowSelection, $renderMode)
    {
        $value = static::toSingleValue($fieldType, $value);
        $selectorValue = null;
        if ($allowSelection && \CBPActivity::isExpression($value))
        {
            $selectorValue = $value;
            $value = null;
        }

        $renderResult = static::renderControl($fieldType, $field, $value, $allowSelection, $renderMode);

        if ($allowSelection)
        {
            $renderResult .= static::renderControlSelector($field, $selectorValue, true, '', $fieldType);
        }

        return $renderResult;
    }