a method of setting and maintaining a tool in a set position for a period of time includes the following . causing a component of a device to move relative to another component of the device , interengaging one or more features of at least one of the components with the another component , creating a set condition of a tool engaged with the component and the another component with the causing and interengaging . a method of dissolving at least the one or more features when removal of the tool is desired .