Gets the field type instance based on the fieldtype as string passed in. This routine checks whether the passed in string is a grouped element reference If not, it tries to check whether the string is a type shortcut. if not, it returns null, otherwise it will return the element represented.

public IFieldType GetFieldTypeInstance(
	string fieldTypeAsString
)

Public Function GetFieldTypeInstance ( 
	fieldTypeAsString As String
) As IFieldType