成员的完整列表，这些成员属于 FoxitPDFSDKPython2.Metadata,包括所有继承而来的类成员

GetCreationDateTime()	FoxitPDFSDKPython2.Metadata
GetCustomerKeys()	FoxitPDFSDKPython2.Metadata
GetModifiedDateTime()	FoxitPDFSDKPython2.Metadata
GetValues(key)	FoxitPDFSDKPython2.Metadata
HasKey(key)	FoxitPDFSDKPython2.Metadata
IsEmpty()	FoxitPDFSDKPython2.Metadata
Metadata(other)	FoxitPDFSDKPython2.Metadata
RemoveCustomerKey(key)	FoxitPDFSDKPython2.Metadata
SetCreationDateTime(date_time)	FoxitPDFSDKPython2.Metadata
SetModifiedDateTime(date_time)	FoxitPDFSDKPython2.Metadata
SetValues(key, value_array)	FoxitPDFSDKPython2.Metadata