Provided by: systemtap-doc_2.3-1ubuntu1.4_all 

NAME
function::thread_indent - returns an amount of space with the current task information
SYNOPSIS
thread_indent:string(delta:long)
ARGUMENTS
delta
the amount of space added/removed for each call
DESCRIPTION
This function returns a string with appropriate indentation for a thread. Call it with a small positive
or matching negative delta. If this is the real outermost, initial level of indentation, then the
function resets the relative timestamp base to zero. An example is shown at the end of this file.
SystemTap Tapset Reference March 2016 FUNCTION::THREAD_IND(3stap)