static ProgramModule createRootModule(Program program, String treeName)
			throws DuplicateNameException {

		Listing listing = program.getListing();
		ProgramModule root = listing.createRootModule(treeName);
		renameFragments(program, treeName);
		return root;
	}
Create a tree in the program with the given tree name.
@param program program
@param treeName tree name
@return Module root module for the new tree
@throws DuplicateNameException if treeName already exists
Ghidra/Features/Base/src/main/java/ghidra/app/cmd/module/CreateDefaultTreeCmd.java