public final void rule__JvmParameterizedTypeReference__Group__1__Impl() throws RecognitionException {

        		int stackSize = keepStackSize();
        	
        try {
            // InternalXtype.g:1051:1: ( ( ( rule__JvmParameterizedTypeReference__Group_1__0 )? ) )
            // InternalXtype.g:1052:1: ( ( rule__JvmParameterizedTypeReference__Group_1__0 )? )
            {
            // InternalXtype.g:1052:1: ( ( rule__JvmParameterizedTypeReference__Group_1__0 )? )
            // InternalXtype.g:1053:2: ( rule__JvmParameterizedTypeReference__Group_1__0 )?
            {
            if ( state.backtracking==0 ) {
               before(grammarAccess.getJvmParameterizedTypeReferenceAccess().getGroup_1()); 
            }
            // InternalXtype.g:1054:2: ( rule__JvmParameterizedTypeReference__Group_1__0 )?
            int alt11=2;
            int LA11_0 = input.LA(1);

            if ( (LA11_0==16) ) {
                alt11=1;
            }
            switch (alt11) {
                case 1 :
                    // InternalXtype.g:1054:3: rule__JvmParameterizedTypeReference__Group_1__0
                    {
                    pushFollow(FOLLOW_2);
                    rule__JvmParameterizedTypeReference__Group_1__0();

                    state._fsp--;
                    if (state.failed) return ;

                    }
                    break;

            }

            if ( state.backtracking==0 ) {
               after(grammarAccess.getJvmParameterizedTypeReferenceAccess().getGroup_1()); 
            }

            }


            }

        }
        catch (RecognitionException re) {
            reportError(re);
            recover(input,re);
        }
        finally {

            	restoreStackSize(stackSize);

        }
        return ;
    }
public final void rule__JvmParameterizedTypeReference__Group__1__Impl ( ) throws RecognitionException { int stackSize = keepStackSize ( ) ; try { { { if ( state . backtracking == 0 ) { before ( grammarAccess . getJvmParameterizedTypeReferenceAccess ( ) . getGroup_1 ( ) ) ; } int alt11 = 2 ; int LA11_0 = input . LA ( 1 ) ; if ( ( LA11_0 == 16 ) ) { alt11 = 1 ; } switch ( alt11 ) { case 1 : { pushFollow ( FOLLOW_2 ) ; rule__JvmParameterizedTypeReference__Group_1__0 ( ) ; state . _fsp -- ; if ( state . failed ) return ; } break ; } if ( state . backtracking == 0 ) { after ( grammarAccess . getJvmParameterizedTypeReferenceAccess ( ) . getGroup_1 ( ) ) ; } } } } catch ( RecognitionException re ) { reportError ( re ) ; recover ( input , re ) ; } finally { restoreStackSize ( stackSize ) ; } return ; }
InternalXtype.g:1047:1: rule__JvmParameterizedTypeReference__Group__1__Impl : ( ( rule__JvmParameterizedTypeReference__Group_1__0 )? ) ;