code: public PreExecutionInterceptorContext mustCollectCallTree(String reason) {
  		logger.debug("Must collect call tree because {}", reason);
  		mustCollectCallTree = true;
  		collectCallTree = true;
  		return this;
  	}
docs: Makes sure, that a call tree is collected for the current request. In other words, profiles this request.
  
  @param reason the reason why a call tree should always be collected (debug message)
  @return <code>this</code> for chaining