src/main/java/com/uploadcare/urls/CdnPathBuilder.java
public CdnPathBuilder cropCenter(int width, int height) {
        dimensionsGuard(width, height);
        sb.append("/-/crop/")
                .append(width)
                .append("x")
                .append(height)
                .append("/center");
        return this;
    }
public CdnPathBuilder cropCenter(int width, int height) {
        dimensionsGuard(width, height);
        sb.append("/-/crop/")
                .append(width)
                .append("x")
                .append(height)
                .append("/center");
        return this;
    }
Adds center-aligned crop.

@param width Crop width
@param height Crop height