Added docblocks

src/JWTToken.php

@@ -72,11 +72,25 @@ class JWTToken
         }
     }
 
+    /**
+     * Returns true if the expiry is not in the past.
+     * 
+     * NOTE: This function will return true if the expiry header is missing, and
+     * it will not validate any claims. For actual verification of a token matching
+     * issuers, audience or other claims, see Validator\JWTValidator.
+     * 
+     * @return bool True if the token expiry timestamp is missing or in the future
+     */
     public function isValid(): bool
     {
         return $this->valid;
     }
 
+    /**
+     * Returns true if the token was generated as opposed to parsed.
+     * 
+     * @return bool
+     */
     public function isGenerated(): bool
     {
         return $this->generated;
@@ -90,16 +104,43 @@ class JWTToken
         }
     }
 
+    /**
+     * Add a claim to a token. Throws an exception if the claim already exists.
+     * 
+     * @param string $name The name of the claim
+     * @param mixed $value Claim value
+     * @throws \NoccyLabs\SimpleJWT\Collection\PropertyException if the claim already exists.
+     */
     public function addClaim(string $name, $value)
     {
         $this->claims->add($name, $value);
     }
 
+    /**
+     * Add a claim to a token. If the claim already exists it will be updated with
+     * the provided value.
+     * 
+     * @param string $name The name of the claim
+     * @param mixed $value Claim value
+     */
     public function setClaim(string $name, $value)
     {
         $this->claims->set($name, $value);
     }
 
+    /**
+     * Set the time of expiry for the token.
+     * 
+     * The expiry can be supplied as:
+     *  - \DateTime instance
+     *  - Unixtime as an integer
+     *  - A string represening the expiry time
+     *  - A period followed by a letter (m,h,d,w)
+     *  - null, to unset the expiry
+     * 
+     * @param string|int|\DateTime $expiry
+     * @return void
+     */
     public function setExpiry($expiry)
     {
         if ($expiry instanceof \DateTime) {