fix: add new Twiml type to deal with constructor overloading issue

src/main/java/com/twilio/converter/Promoter.java

@@ -1,6 +1,7 @@
 package com.twilio.converter;
 
 import com.twilio.type.PhoneNumber;
+import com.twilio.type.Twiml;
 
 import java.net.URI;
 import java.net.URISyntaxException;
@@ -33,6 +34,18 @@ public static PhoneNumber phoneNumberFromString(final String pn) {
         return new PhoneNumber(pn);
     }
 
+    /**
+     * Create a @see com.twilio.types.Twiml from a string
+     *
+     * @param twiml Twiml to convert
+     * @return built @see com.twilio.types.Twiml
+     */
+    public static Twiml twimlFromString(final String twiml) {
+        return new Twiml(twiml);
+    }
+
+
+
     /**
      * Create a list from a single element.
      *

src/main/java/com/twilio/type/Twiml.java

@@ -0,0 +1,34 @@
+package com.twilio.type;
+
+import java.util.Objects;
+
+public class Twiml {
+    private final String rawTwiml;
+
+    public Twiml(String twiml) {
+        this.rawTwiml = twiml;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+
+        Twiml other = (Twiml) o;
+        return Objects.equals(this.rawTwiml, other.rawTwiml);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(this.rawTwiml);
+    }
+
+    @Override
+    public String toString() {
+        return this.rawTwiml;
+    }
+}

src/test/java/com/twilio/converter/PromoterTest.java

@@ -2,6 +2,7 @@
 
 import com.google.common.collect.Lists;
 import com.twilio.type.PhoneNumber;
+import com.twilio.type.Twiml;
 import org.junit.Assert;
 import org.junit.Test;
 
@@ -27,6 +28,12 @@ public void testPhoneNumberFromString() {
         Assert.assertEquals(new PhoneNumber("+12345678910"), pn);
     }
 
+    @Test
+    public void testTwimlFromString() {
+        Twiml twiml = Promoter.twimlFromString("<Response><Say>Ahoy!</Say></Response>");
+        Assert.assertEquals(new Twiml("<Response><Say>Ahoy!</Say></Response>"), twiml);
+    }
+
     @Test
     public void testPromoteList() {
         String s = "hi";