You need to add this method to CmMethodLOC:

measureLoc: method
    "Answer the number of lines of code in @method.

    PARAMETERS
        method <CompiledMethod>

    RETURN VALUE
        <CtMeasurement|nil>"

    | source sourceNode |

    source := self cachedSourceFor: method.
    (sourceNode := self cachedParseTreeFor: method) isNil ifTrue: [^0].

    sourceNode statements isEmpty ifTrue: [^0].

    ^self linesOfCodeIn: source using: sourceNode
	
	++++++++++++++++++++++++++++++++++++++++++++++++++++++++

| apps classes loc methods names instVars bm cml mm mi ml maxInst |

names := #('Jw' ).  "<---------------------------- put your application prefixes here"

apps := System loadedApplications. instVars := loc := maxInst := 0. 
maxMeth := 0. cml := CmMethodLOC new. bm := Set new.

apps := apps select: [:each ||cnt| cnt := 0. names do: 
				[:each2 | cnt := cnt + (each name asString indexOfSubCollection: each2 startingAt: 1 ifAbsent: [0])].
				cnt > 0].
Transcript show: 'Apps ', apps size printString;cr.
apps do: [:each | Transcript show: each printString;cr].
classes := OrderedCollection new. methods := OrderedCollection new.
apps do: [:each | classes addAll: each allLocalClasses]. 
Transcript show: 'Classes ', classes size printString;cr.
maxCnt := 0.
classes do: [:each ||localMeth| instVars := instVars + each instSize. 
	each instSize > maxInst ifTrue: [maxInst := each instSize. instCl := each name].
	localMeth := (each methodsArray select: [:e | e notNil]).
	localMeth := localMeth select: [:e | (e class = CompiledMethod)].
	localMeth size > maxMeth ifTrue: [maxMeth := localMeth size. methCl := each class name].
	locCnt := 0.
	localMeth do: [:e | locCnt := locCnt + (cml measureLoc: e)].
	locCnt > maxCnt ifTrue: [maxCnt := locCnt. maxCl := each class name].
	loc := loc + locCnt.
	methods addAll: localMeth.
		].

Transcript show: 'Total number of methods ', methods size printString;cr.  
"methods do: [:each | loc := loc + (cml measureLoc: each)]."
Transcript show: 'Total Lines of code ', loc  printString;cr. 
Transcript show: 'Average Lines of code per method ', (loc / methods size asFloat) printString;cr.