commons/http/src/main/java/org/ldp4j/http/RFC6838MediaRangeValidator.java
@Override
	public void checkSubType(final String subType) {
		validateLength(subType,"Subtype");
		validateFirstChar(subType,"subtype");
		validateOtherChars(subType,"subtype");
	}
@Override
	public void checkSubType(final String subType) {
		validateLength(subType,"Subtype");
		validateFirstChar(subType,"subtype");
		validateOtherChars(subType,"subtype");
	}
Checks the given {@code subtype} for illegal characters, as defined in RFC
6838, section 4.2. NOTE: '*' is accepted as a valid subtype.

@param subType
the string to validate
@throws IllegalArgumentException
in case of illegal characters
@see <a href="https://tools.ietf.org/html/rfc6838#section-4.2">Media Type
Specifications and Registration Procedures, Section 4.2</a>