Package com.smartgwt.client.docs
Interface VelocityExpression
public interface VelocityExpression
An expression in the  Velocity Template
 Language (VTL).  For more information on Smart GWT's Velocity support,  see 
Velocity support.  Note that a VelocityExpression must often
 evaluate to a particular type of value  to be useful.  For example, DataSource.requires must evaluate to true or false  (Boolean
 objects or strings containing those two words), and Mail.messageData must evaluate to a Java Map object, or a Java List containing only 
 Maps.