Merged in PA1

src/main/java/chocopy/common/astnodes/Node.java

@@ -78,6 +78,7 @@ public abstract class Node {
     @JsonInclude(JsonInclude.Include.NON_EMPTY)
     private String errorMsg;
 
+
     /** A Node corresponding to source text between LEFT and RIGHT. */
     public Node(Location left, Location right) {
         if (left != null) {
@@ -100,6 +101,7 @@ public abstract class Node {
         return location;
     }
 
+
     /** Copy LOCATION as getLocation(). */
     public void setLocation(final int[] location) {
         System.arraycopy(location, 0, this.location, 0, 4);
@@ -113,6 +115,7 @@ public abstract class Node {
         this.errorMsg = msg;
     }
 
+
     /** Return true iff I have been marked with an error message. */
     @JsonIgnore
     public boolean hasError() {
@@ -135,11 +138,13 @@ public abstract class Node {
         }
     }
 
+
     /** Return a serialization of this node in JSON format. */
     public String toJSON() throws JsonProcessingException {
         return mapper.writeValueAsString(this);
     }
 
+
     /** Mapper to-and-from serialized JSON. */
     private static final ObjectMapper mapper = new ObjectMapper();
 
@@ -148,6 +153,7 @@ public abstract class Node {
         mapper.registerModule(new ParameterNamesModule());
     }
 
+
     /** Returns a T from JSON, a JSON-serialized T value with class CLAS. */
     public static <T> T fromJSON(String json, Class<T> clas) throws IOException {
         return mapper.readValue(json, clas);