jodd-madvoc/src/main/java/jodd/madvoc/result/RawData.java
public RawData as(final String mimeOrExtension) {
		if (mimeOrExtension.contains(StringPool.SLASH)) {
			this.mimeType = mimeOrExtension;
		}
		else {
			this.mimeType = MimeTypes.getMimeType(mimeOrExtension);
		}
		return this;
	}
public RawData as(final String mimeOrExtension) {
		if (mimeOrExtension.contains(StringPool.SLASH)) {
			this.mimeType = mimeOrExtension;
		}
		else {
			this.mimeType = MimeTypes.getMimeType(mimeOrExtension);
		}
		return this;
	}
Defines mime type by providing real mime type or just extension!