class_docstr: CsvSchemaBuilder is for building a :class:`~CsvSchema`, corresponding to Java
  ``com.fasterxml.jackson.dataformat.csv.CsvSchema.Builder`` class.
  
  .. versionadded:: 1.16.0
docstr: Set column separator, ``char`` should be a single char, default to ``,``.
docstr_tok: ["Set","column","separator",",","``","char","``","should","be","a","single","char",",","default","to","``",",","``","."]
code: def set_column_separator(self, char: str):
      """
      Set column separator, ``char`` should be a single char, default to ``,``.
      """
      if len(char) != 1:
          raise ValueError(
              "Column separator must be a single char, got {}".format(
                  char
              )
          )
      self._j_schema_builder.setColumnSeparator(char)
      return self
  
imports: from typing import Optional, TYPE_CHECKING
  from pyflink.common.serialization import BulkWriterFactory, RowDataBulkWriterFactory, SerializationSchema, DeserializationSchema
  from pyflink.common.typeinfo import TypeInformation
  from pyflink.datastream.connectors.file_system import StreamFormat
  from pyflink.java_gateway import get_gateway
label_desc: Use image node_id 14 for calling the CsvSchemaBuilder obj's underlying member method code with example usage: obj.set_column_separator(char) and returns: self