question: public static int [ ] indexOfRegion ( String string , String leftBoundary , String rightBoundary , int offset ) { int ndx = offset ; int [ ] res = new int [ 4 ] ; ndx = string . indexOf ( leftBoundary , ndx ) ; if ( ndx == - 1 ) { return null ; } res [ 0 ] = ndx ; ndx += leftBoundary . length ( ) ; res [ 1 ] = ndx ; ndx = string . indexOf ( rightBoundary , ndx ) ; if ( ndx == - 1 ) { return null ; } res [ 2 ] = ndx ; res [ 3 ] = ndx + rightBoundary . length ( ) ; return res ; }
target:  Returns indexes of the first region without escaping character.