question: public static String ofMethod ( CtClass returnType , CtClass [ ] paramTypes ) { StringBuffer desc = new StringBuffer ( ) ; desc . append ( '(' ) ; if ( paramTypes != null ) { int n = paramTypes . length ; for ( int i = 0 ; i < n ; ++ i ) toDescriptor ( desc , paramTypes [ i ] ) ; } desc . append ( ')' ) ; if ( returnType != null ) toDescriptor ( desc , returnType ) ; return desc . toString ( ) ; }
target:  Returns the descriptor representing a method that receives the given parameter types and returns the given type.