Add method to Document to get the current environment

document.go

@@ -47,6 +47,11 @@ func (this *Document) Execute (output io.Writer, data ExecutionData) error {
 	})
 }
 
+// Environment returns the environment this document is in.
+func (this *Document) Environment () *Environment {
+	return this.environment
+}
+
 // ExecutionData is data made available to documents as they are being exeucted.
 type ExecutionData struct {
 	Data any               // Custom data