code: private function getChildrenRelationshipsWithoutCache($tableName)
      {
          $schema = $this->getSchema();
          $children = [];
          foreach ($schema->getTables() as $table) {
              if ($table->getName() === $tableName) {
                  continue;
              }
              $fks = $this->removeDuplicates($table->getForeignKeys());
              foreach ($fks as $fk) {
                  if ($fk->getForeignTableName() === $tableName && $this->isInheritanceRelationship($fk)) {
                      $children[] = $fk;
                  }
              }
          }
  
          return $children;
      }
docs: If this table is pointed by children tables (if other child tables have a primary key that is also a
  foreign key to this table), this function will return the list of child tables.
  This function will return an empty array if there are no children tables.
  
  @param string $tableName
  
  @return ForeignKeyConstraint[]