Replace `ifNil:[...]` with `isNil ifTrue:[...]`
The latter is optimized by compilers and therefore faster.
"{ Package: 'stx:goodies/petitparser/parsers/java' }"
"{ NameSpace: Smalltalk }"
PJASTNode subclass:#PJModifierNode
instanceVariableNames:'keyword'
classVariableNames:''
poolDictionaries:''
category:'PetitJava-AST'
!
!PJModifierNode class methodsFor:'instance creation'!
keyword: aString
^(self new) keyword: aString; yourself
! !
!PJModifierNode methodsFor:'accessing'!
keyword
^ keyword
!
keyword: anObject
keyword := anObject
! !
!PJModifierNode methodsFor:'testing'!
isAnnotation
^false
!
isModifier
^true
! !