code: function isLLCallcode (node) {
    return isMemberAccess(node,
            exactMatch(util.escapeRegExp(lowLevelCallTypes.CALLCODE.type)),
            undefined, exactMatch(basicTypes.ADDRESS), exactMatch(lowLevelCallTypes.CALLCODE.ident))
  }
docs: True if low level callcode
  @node {ASTNode} some AstNode
  @return {bool}