code: public function maxChildren($conditionType)
      {
          if (!isset($GLOBALS['METAMODELS']['inputscreen_conditions'][$conditionType]['maxChildren'])) {
              return null;
          }
  
          // @codingStandardsIgnoreStart Silencing errors is discouraged
          @trigger_error('Configuring input screen conditions via global array is deprecated. ' .
              'Please implement/configure a valid condition factory.', E_USER_DEPRECATED);
          // @codingStandardsIgnoreEnd
  
          return $GLOBALS['METAMODELS']['inputscreen_conditions'][$conditionType]['maxChildren'];
      }
docs: Get the amount of children this type supports - for undefined returns null.
  
  @param string $conditionType The type name.
  
  @return int|null
  
  @SuppressWarnings(PHPMD.Superglobals)
  @SuppressWarnings(PHPMD.CamelCaseVariableName)