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&gt; There's [...] a bidirectional mapping between the textual representation of a function in Ballerina syntax and the visual representation of the function as a sequence diagram. The sequence diagram representation fully shows the behavior of the function as it relates to concurrency and network interaction.
&gt; The closest analogy I can think of is Visual Basic. The visual model of a UI as a form is integrated with the language semantic to make writing a Windows GUI application much easier than before. Ballerina is trying to do something similar but for a different domain. You could think of it as Visual Basic for the Cloud.
From <https://blog.jclark.com/2019/09/ballerina-programming-language-part-1.html|James Clark's blog post on Ballerina Programming Language concepts>.

They designed the language such that the diagrams they used to draw on whiteboards could be automatically generated from the source code. See: <https://ballerina.io/why-ballerina/sequence-diagrams-for-programming/|documentation for the sequence diagrams>.