How does the LLVM class work?

[palapapa]

Some methods from this package seem to be calling non-existent methods in the LLVM class? For example, LLVMBuilderRef.cs contains the line:

public static LLVMBuilderRef Create(LLVMContextRef C) => LLVM.CreateBuilderInContext(C);

But there isn't a method in LLVM called CreateBuilderInContext. This probably has something to do with all the DllImports in the LLVM class, but what is the exact mechanics?