plugins/bem.js
function isStaticDecl(node) {
    var parent = node.parent;
    return hasStatic(parent) &&
        parent.arguments[2] === node;
}
function isStaticDecl(node) {
    var parent = node.parent;
    return hasStatic(parent) &&
        parent.arguments[2] === node;
}
Returns true if passed AST node is a static
methods declaration of BEM.DOM.decl
@param {Object} node an AST node of BEM.DOM.decl argument
@returns {Boolean}