src/class-query-builder.php
public function set( $name, $value = null ) {

		if ( is_array( $name ) ) {
			$this->statements['values'] = $this->statements['values'] + $name;
		} else {
			$this->statements['values'][ $name ] = $value;
		}

		return $this;
	}
public function set( $name, $value = null ) {

		if ( is_array( $name ) ) {
			$this->statements['values'] = $this->statements['values'] + $name;
		} else {
			$this->statements['values'][ $name ] = $value;
		}

		return $this;
	}
Set values for insert/update

@param string|array $name  Key of pair.
@param string|array $value Value of pair.

@return self The current query builder.