Update docs for 1.4.2 release
diff --git a/docs/dyn/gmail_v1.users.threads.html b/docs/dyn/gmail_v1.users.threads.html
index b748a07..334231c 100644
--- a/docs/dyn/gmail_v1.users.threads.html
+++ b/docs/dyn/gmail_v1.users.threads.html
@@ -127,6 +127,7 @@
     "snippet": "A String", # A short part of the message text.
     "messages": [ # The list of messages in the thread.
       { # An email message.
+        "internalDate": "A String", # The internal message creation timestamp (epoch ms), which determines ordering in the inbox. For normal SMTP-received email, this represents the time the message was originally accepted by Google, which is more reliable than the Date header. However, for API-migrated mail, it can be configured by client to be based on the Date header.
         "historyId": "A String", # The ID of the last history record that modified this message.
         "payload": { # A single MIME message part. # The parsed email structure in the message parts.
           "body": { # The body of a single MIME message part. # The message part body for this part, which may be empty for container MIME message parts.
@@ -188,6 +189,7 @@
         "snippet": "A String", # A short part of the message text.
         "messages": [ # The list of messages in the thread.
           { # An email message.
+            "internalDate": "A String", # The internal message creation timestamp (epoch ms), which determines ordering in the inbox. For normal SMTP-received email, this represents the time the message was originally accepted by Google, which is more reliable than the Date header. However, for API-migrated mail, it can be configured by client to be based on the Date header.
             "historyId": "A String", # The ID of the last history record that modified this message.
             "payload": { # A single MIME message part. # The parsed email structure in the message parts.
               "body": { # The body of a single MIME message part. # The message part body for this part, which may be empty for container MIME message parts.
@@ -269,6 +271,7 @@
     "snippet": "A String", # A short part of the message text.
     "messages": [ # The list of messages in the thread.
       { # An email message.
+        "internalDate": "A String", # The internal message creation timestamp (epoch ms), which determines ordering in the inbox. For normal SMTP-received email, this represents the time the message was originally accepted by Google, which is more reliable than the Date header. However, for API-migrated mail, it can be configured by client to be based on the Date header.
         "historyId": "A String", # The ID of the last history record that modified this message.
         "payload": { # A single MIME message part. # The parsed email structure in the message parts.
           "body": { # The body of a single MIME message part. # The message part body for this part, which may be empty for container MIME message parts.
@@ -322,6 +325,7 @@
     "snippet": "A String", # A short part of the message text.
     "messages": [ # The list of messages in the thread.
       { # An email message.
+        "internalDate": "A String", # The internal message creation timestamp (epoch ms), which determines ordering in the inbox. For normal SMTP-received email, this represents the time the message was originally accepted by Google, which is more reliable than the Date header. However, for API-migrated mail, it can be configured by client to be based on the Date header.
         "historyId": "A String", # The ID of the last history record that modified this message.
         "payload": { # A single MIME message part. # The parsed email structure in the message parts.
           "body": { # The body of a single MIME message part. # The message part body for this part, which may be empty for container MIME message parts.
@@ -375,6 +379,7 @@
     "snippet": "A String", # A short part of the message text.
     "messages": [ # The list of messages in the thread.
       { # An email message.
+        "internalDate": "A String", # The internal message creation timestamp (epoch ms), which determines ordering in the inbox. For normal SMTP-received email, this represents the time the message was originally accepted by Google, which is more reliable than the Date header. However, for API-migrated mail, it can be configured by client to be based on the Date header.
         "historyId": "A String", # The ID of the last history record that modified this message.
         "payload": { # A single MIME message part. # The parsed email structure in the message parts.
           "body": { # The body of a single MIME message part. # The message part body for this part, which may be empty for container MIME message parts.