Indonesia without WWII

In a situation where the Japanese never invade the Dutch East Indies how long can the Dutch hold on to Indonesia? Will the colony eventually be independent as a single country or several? Will it even become independent?
 
Assuming that the Germans still invade the Netherlands, Indonesia would still be independent by 1949, and maybe even sooner if Indonesian nationalists can form a stable government prior to the end of WWI.
 
Indonesia will be gone by the later 1950s or early 1960s, however, It will either be a federal system or the country will be Balkanized.
 
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