public MustacheEngineBuilder registerHelper(String name, Helper helper) {
        return registerHelper(name, helper, false);
    }
public MustacheEngineBuilder registerHelper(String name, Helper helper) {
        return registerHelper(name, helper, false);
    }
public MustacheEngineBuilder registerHelper ( String name , Helper helper ) { return registerHelper ( name , helper , false ) ; }
Each helper must be registered with a unique name. If there are more
helpers registered with the same name an {@link IllegalArgumentException}
is thrown. Use {@link #registerHelper(String, Helper, boolean)} to
overwrite the helper.

@param name
@param helper
@return self
Each helper must be registered with a unique name . If there are more helpers registered with the same name an { @link IllegalArgumentException } is thrown . Use { @link #registerHelper ( String Helper boolean ) } to overwrite the helper .