whole_func_string: function isStaticDecl(node) {
      var parent = node.parent;
      return hasStatic(parent) &&
          parent.arguments[2] === node;
  }
func_code_string: function isStaticDecl(node) {
      var parent = node.parent;
      return hasStatic(parent) &&
          parent.arguments[2] === node;
  }
func_documentation_string: 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}