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SDO_Model_Type::isAbstractType — Test to see if this SDO_Model_Type is an abstract data type
此函数是实验性的。此函数的表象，包括名称及其相关文档都可能在未来的 PHP 发布版本中未通知就被修改。使用本函数风险自担 。
Test to see if this SDO_Model_Type is an abstract data type.
Returns TRUE if this type is abstract, that is, no SDO_DataObject
of this type can be instantiated, though other types may inherit
from it.
None.
Returns TRUE if this type is an abstract data type, otherwise returns
FALSE.