goja-core/src/main/java/goja/core/kits/stream/FastCharBuffer.java
public CharSequence subSequence(int start, int end) {
        int len = end - start;
        return new StringBuilder(len).append(toArray(start, len));
    }
public CharSequence subSequence(int start, int end) {
        int len = end - start;
        return new StringBuilder(len).append(toArray(start, len));
    }
public CharSequence subSequence ( int start , int end ) { int len = end - start ; return new StringBuilder ( len ) . append ( toArray ( start , len ) ) ; }
Returns sub sequence.
Returns sub sequence .