question: public static SourceMethodNode findSourceMethodNodeWithCallers ( Map < String , Map < String , Set < JsonElement > > > callerMap , IMethod jdtMethod , String jdtClassName , String srcClassName , int srcLine ) { String jdtMethodName = jdtMethod . getElementName ( ) ; String [ ] jdtParamTypes = jdtMethod . getParameterTypes ( ) ; for ( String sig : callerMap . keySet ( ) ) { String sootMethodName = Utils . signatureMethodName ( sig ) ; if ( sootMethodName . equals ( jdtMethodName ) ) { String sootClassName = Utils . signatureClass ( sig ) ; if ( classNamesMatch ( sootClassName , jdtClassName ) ) { String [ ] sootParamTypes = Utils . signatureParameterTypes ( sig ) ; if ( typesMatch ( sootParamTypes , jdtParamTypes ) ) { SourceMethodNode methodNode = SourceMethodNode . get ( sig ) ; methodNode . sourceClass = srcClassName ; methodNode . line = srcLine ; return methodNode ; } } } } return null ; }
target:  Searches the key set in the given callerMap (a map from callee signatures to caller  signatures to sets of method calls) for a source method node that matches to the given parameter values.