this.duplicateTermRemoved = duplicateTermRemoved;
            return this;
        }

        public TextNormalizeContext spaceChars(final int[] spaceChars) {
            this.spaceChars = spaceChars;
            return this;
        }
    }

    public static TextNormalizeContext normalizeText(final Reader reader) {
        return new TextNormalizeContext(reader);

        if (title == null) {
            return StringUtil.EMPTY; // empty
        }

        final int[] spaceChars = getSpaceChars();
        try (final Reader reader = new StringReader(title)) {
            return TextUtil.normalizeText(reader).initialCapacity(title.length()).spaceChars(spaceChars).execute();
        } catch (final IOException e) {
            return StringUtil.EMPTY; // empty
        }
    }

    }

    public void setMaxSymbolTermSize(final int maxSymbolTermSize) {
        this.maxSymbolTermSize = maxSymbolTermSize;
    }

    public void setSpaceChars(final int[] spaceChars) {
        this.spaceChars = spaceChars;
    }

    public void setTikaConfig(final TikaConfig tikaConfig) {
        this.tikaConfig = tikaConfig;
    }

// to be present to avoid ambiguity with things like "{{-3}}". It reads
// better with the space present anyway. For simplicity, only ASCII
// does the job.
const (
	spaceChars    = " \t\r\n"  // These are the space characters defined by Go itself.
	trimMarker    = '-'        // Attached to left/right delimiter, trims trailing spaces from preceding/following text.

                final int length = spaceStr.length();
                spaceChars = new int[length];
                for (int i = 0; i < length; i++) {
                    spaceChars[i] = spaceStr.codePointAt(i);
                }
            }
            propMap.put(key, spaceChars);
        }
        return spaceChars;
    }

    String getCrawlerDocumentFullstopChars();

            c[ci++] = ':';
            do {
                if( si == length ) {
                    int n = 16 - s;
                    System.arraycopy( SPACE_CHARS, 0, c, ci, n * 3 );
                    ci += n * 3;
                    System.arraycopy( SPACE_CHARS, 0, d, s, n );
                    break;
                }
                c[ci++] = ' ';
                i = src[srcIndex + si] & 0xFF;