Description:
------------
The __getTypes() method helps to serve as a reference when writing SOAP consumer 
code, which is very useful.

However, enumeration types in WSDL aren't supported properly; they're printed as 
only the enumeration base type (which is usually 'string' in my case).

Test script:
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<xsd:simpleType name="PersonaMemberType"> 
<xsd:restriction base="xsd:string"> 
<xsd:enumeration value="NEW"/> 
<xsd:enumeration value="LIMITED"/> 
<xsd:enumeration value="FREE"/> 
<xsd:enumeration value="PAID_ACTIVE"/> 
<xsd:enumeration value="TRIAL_ACTIVE"/> 
<xsd:enumeration value="PAID_EXPIRED"/> 
<xsd:enumeration value="TRIAL_EXPIRED"/> 
</xsd:restriction> 
</xsd:simpleType>

Expected result:
----------------
string PersonaMemberType 
{NEW,LIMITED,FREE,PAID_ACTIVE,TRIAL_ACTIVE,PAID_EXPIRED,TRIAL_EXPIRED}

Actual result:
--------------
string PersonaMemberType