function isImmediateRequire( node ) {
		if (
			node.type === 'CallExpression' &&
			node.callee.type === 'Identifier' &&
			node.callee.name === 'require'
		) {
			return true;
		}
		return false;
	}
Checks whether require() expression is immediately invoked.

@private
@param {ASTNode} node - node to examine
@returns {boolean} boolean indicating whether require() is immediately invoked