bundles/org.apache.jasper.glassfish/src/org/apache/jasper/runtime/JspContextWrapper.java
private String findAlias(String varName) {

	if (aliases == null)
	    return varName;

	String alias = aliases.get(varName);
	if (alias == null) {
	    return varName;
	}
	return alias;
    }
private String findAlias(String varName) {

	if (aliases == null)
	    return varName;

	String alias = aliases.get(varName);
	if (alias == null) {
	    return varName;
	}
	return alias;
    }
Checks to see if the given variable name is used as an alias, and if so,
returns the variable name for which it is used as an alias.

@param varName The variable name to check
@return The variable name for which varName is used as an alias, or
varName if it is not being used as an alias