This module defines rest api to communicate with rpc server.
Declares template for holding compile time info about column format: name and element type.
First column parameter is an element type, second parameter is column name in response.
alias col = Column!(uint, "column_name"); static assert(is(col.type == uint)); static assert(col.name == "column_name");
Checks is U actually equal Column semantic, i.e. holding type and name.
Structure represents normal response from RPC server with desired columns. Columns element type and name is specified by Column template.