code: public String getHeader(String name) {
  
  		String nameToSearch = getCorrectHeaderName(name);
  		String value = null;
  		if (this.message.getHeader(nameToSearch) != null) {
  			value = ((SIPHeader) this.message.getHeader(nameToSearch))
  					.getValue();
  		}
  		if(logger.isDebugEnabled()) {
  			logger.debug("getHeader "+ name+ ", value="+ value	);
  		}
  		return value;
  	}
docs: /*
  (non-Javadoc)
  @see javax.servlet.sip.SipServletMessage#getHeader(java.lang.String)