// scope, the function scopes are embedded in the file scope of the file
	// containing the function declaration.
	//
	// The Scope of a function contains the declarations of any
	// type parameters, parameters, and named results, plus any
	// local declarations in the body block.
	// It is coextensive with the complete extent of the
	// function's syntax ([*ast.FuncDecl] or [*ast.FuncLit]).