public boolean hasMapping(String mappingName) {
        return mappings.containsKey(mappingName);
    }
Returns true if this InputManager has a mapping registered
for the given mappingName.

@param mappingName The mapping name to check.
@return true if the mapping is registered, otherwise false
@see InputManager#addMapping(java.lang.String, com.jme3.input.controls.Trigger[])
@see InputManager#deleteMapping(java.lang.String)
jme3-core/src/main/java/com/jme3/input/InputManager.java