Bug 114098 [content assist] Camel case completions are not inserted
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/java/JavaCompletionProposal.java
public boolean isValidFor(IDocument document, int offset) {
		return validate(document, offset, null);
	}
	/*
	 * @see org.eclipse.jface.text.contentassist.ICompletionProposalExtension2#validate(org.eclipse.jface.text.IDocument, int, org.eclipse.jface.text.DocumentEvent)
	 */
	public boolean validate(IDocument document, int offset, DocumentEvent event) {
		if (offset < fReplacementOffset)
			return false;
		/*
		 * See http://dev.eclipse.org/bugs/show_bug.cgi?id=17667
		String word= fReplacementString;
		 */
		boolean validated= startsWith(document, offset, fDisplayString)
				|| startsWith(document, offset, fReplacementString);
		if (validated && event != null) {
			
			int delta= (event.fText == null ? 0 : event.fText.length()) - event.fLength;
			fReplacementLength += delta;
		}
		return validated;
	}
	/**
	 * Gets the proposal's relevance.
	 * @return Returns a int
	 */
	public int getRelevance() {
		return fRelevance;
	}
	/**