How to handle flexible/variable budget code segment with Cost Management API

This blog discusses the flexible/variable budget code segment feature, emphasizing the importance of setting up a budget code template before real budgets are added to the system. It explains how to create fixed and variable budget code segments using specific JSON request bodies, including the use of the new parameter isVariableLength. The blog also outlines how to add a real budget using the segmentCodeMap. 
You can find additional details in this blog