private DLockGrantToken basicGetGrantToken(Object name) {
    return (DLockGrantToken) grantTokens.get(name);
  }
Fetches the grant token value stored in the map under key name.
<p>
Caller must synchronize on grantTokens

@param name the key to fetch the grant token value for
@return the grant token stored under key name guarded.By {@link #grantTokens}
geode-core/src/main/java/org/apache/geode/distributed/internal/locks/DLockGrantor.java