Returns the local, static, or "this" variable with the given name, or
null
if unable to resolve a variable with the name.
@param variableName the name of the variable to search for
@return a variable, or
null
if none
@exception DebugException if this method fails. Reasons include:
- Failure communicating with the VM. The DebugException's status code contains the underlying exception responsible for the failure.
- This stack frame is no longer valid. That is, the thread containing this stack frame has since been resumed.