question: public FieldDeclaration declarationOf ( FieldBinding fieldBinding ) { if ( fieldBinding != null && this . fields != null ) { for ( int i = 0 , max = this . fields . length ; i < max ; i ++ ) { FieldDeclaration fieldDecl ; if ( ( fieldDecl = this . fields [ i ] ) . binding == fieldBinding ) return fieldDecl ; } } return null ; }
target:  Find the matching parse node, answers null if nothing found 